The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
3M Co COM 88579Y101 32,087 152,280 SH   SOLE   149,708 0 2,572
Abbott Labs COM 002824100 2,541 34,639 SH   SOLE   33,341 0 1,298
Abbvie Inc COM 00287Y109 2,646 27,972 SH   SOLE   26,968 0 1,004
Accenture Plc COM G1151C101 23,893 140,380 SH   SOLE   138,053 0 2,327
Acuity Brands Inc COM 00508Y102 638 4,057 SH   SOLE   3,775 0 282
Adobe Sys Inc COM 00724F101 496 1,836 SH   SOLE   1,836 0 0
Aflac Inc COM 001055102 229 4,860 SH   SOLE   4,860 0 0
Air Products & Chemicals Inc COM 009158106 667 3,993 SH   SOLE   3,993 0 0
Alphabet Inc-A COM 02079K305 53,090 43,982 SH   SOLE   43,083 0 899
Alphabet Inc-C COM 02079K107 14,156 11,861 SH   SOLE   11,548 0 313
Altria Group Inc COM 02209S103 799 13,246 SH   SOLE   12,716 0 530
Amazon Com Inc COM 023135106 12,931 6,456 SH   SOLE   6,354 0 102
American Express Co COM 025816109 233 2,184 SH   SOLE   2,184 0 0
American Tower Corp COM 03027X100 55,305 380,629 SH   SOLE   372,547 0 8,082
American Water Works Co Inc COM 030420103 38,005 432,017 SH   SOLE   422,667 0 9,350
Ametek Inc COM 031100100 41,074 519,130 SH   SOLE   511,260 0 7,870
Amgen Inc COM 031162100 1,294 6,241 SH   SOLE   5,736 0 505
Amphenol Corp COM 032095101 45,583 484,824 SH   SOLE   476,170 0 8,654
Ansys Inc COM 03662Q105 18,833 100,882 SH   SOLE   99,722 0 1,160
Aon PLC COM G0408V102 24,937 162,159 SH   SOLE   160,094 0 2,065
Apple Inc COM 037833100 95,008 420,874 SH   SOLE   412,594 0 8,280
Aqua America Inc COM 03836W103 342 9,271 SH   SOLE   9,271 0 0
Assurant Inc COM 04621X108 529 4,905 SH   SOLE   4,905 0 0
AT&T Inc COM 00206R102 1,469 43,756 SH   SOLE   41,716 0 2,040
Automatic Data Processing Inc COM 053015103 10,659 70,752 SH   SOLE   69,424 0 1,328
Bank of America Corp COM 060505104 714 24,220 SH   SOLE   23,851 0 369
Bank of Nova Scotia COM 064149107 525 8,801 SH   SOLE   8,801 0 0
BB&T Corp COM 054937107 657 13,528 SH   SOLE   13,498 0 30
Becton Dickinson & Co COM 075887109 399 1,529 SH   SOLE   1,525 0 4
Berkshire Hathaway Inc-B COM 084670702 44,901 209,710 SH   SOLE   205,223 0 4,487
Biogen Inc COM 09062X103 434 1,227 SH   SOLE   1,227 0 0
Blackrock Inc COM 09247X101 372 789 SH   SOLE   789 0 0
Blackstone Group LP COM 09253U108 392 10,300 SH   SOLE   10,300 0 0
Boeing Co COM 097023105 1,788 4,809 SH   SOLE   4,802 0 7
Booking Holdings Inc COM 09857L108 23,766 11,979 SH   SOLE   11,755 0 224
Borgwarner Inc COM 099724106 25,390 593,498 SH   SOLE   584,364 0 9,134
BP PLC ADR COM 055622104 253 5,496 SH   SOLE   5,496 0 0
Bristol-Myers Squibb Co COM 110122108 1,061 17,088 SH   SOLE   16,723 0 365
Broadcom Ltd COM Y09827109 534 2,163 SH   SOLE   2,163 0 0
Brown Forman Corp-B COM 115637209 1,252 24,763 SH   SOLE   24,763 0 0
Camden Natl Corp COM 133034108 246 5,662 SH   SOLE   5,362 0 300
Canadian Natl Railway COM 136375102 323 3,600 SH   SOLE   3,600 0 0
Carnival Corp COM 143658300 18,717 293,501 SH   SOLE   288,596 0 4,905
Caterpillar Inc COM 149123101 568 3,724 SH   SOLE   3,712 0 12
Cerner Corp COM 156782104 45,099 700,184 SH   SOLE   688,831 0 11,353
Charles Schwab Corp COM 808513105 324 6,600 SH   SOLE   6,564 0 36
Chevron Corp COM 166764100 3,992 32,644 SH   SOLE   31,122 0 1,522
Chubb Ltd COM H1467J104 32,947 246,532 SH   SOLE   242,811 0 3,721
Church & Dwight Inc COM 171340102 449 7,570 SH   SOLE   7,570 0 0
Cisco Systems Inc COM 17275R102 951 19,544 SH   SOLE   19,499 0 45
Citigroup Inc COM 172967424 241 3,357 SH   SOLE   3,357 0 0
Clorox Co COM 189054109 1,079 7,171 SH   SOLE   6,737 0 434
CME Group Inc COM 12572Q105 20,141 118,332 SH   SOLE   116,142 0 2,190
Coca Cola Co COM 191216100 1,167 25,268 SH   SOLE   24,508 0 760
Cognizant Tech Solutions Corp COM 192446102 24,702 320,179 SH   SOLE   315,361 0 4,818
Colgate Palmolive Co COM 194162103 9,538 142,463 SH   SOLE   138,848 0 3,615
Comcast Corp COM 20030N101 7,723 218,102 SH   SOLE   216,227 0 1,875
Conocophillips COM 20825C104 23,486 303,432 SH   SOLE   300,715 0 2,717
Constellation Brands Inc-A COM 21036P108 14,845 68,850 SH   SOLE   67,023 0 1,827
Cooper Companies Inc COM 216648402 15,995 57,711 SH   SOLE   57,041 0 670
Costco Wholesale Corp COM 22160K105 27,613 117,561 SH   SOLE   116,312 0 1,249
CSX Corp COM 126408103 366 4,938 SH   SOLE   4,780 0 158
Cullen/Frost Bankers Inc COM 229899109 24,177 231,496 SH   SOLE   227,977 0 3,519
CVS Health Corp COM 126650100 556 7,058 SH   SOLE   6,958 0 100
Cyberark Software Ltd COM M2682V108 18,240 228,459 SH   SOLE   220,909 0 7,550
Danaher Corp COM 235851102 45,487 418,620 SH   SOLE   410,998 0 7,622
Deere & Co COM 244199105 1,380 9,178 SH   SOLE   8,973 0 205
Diageo Plc ADR COM 25243Q205 471 3,325 SH   SOLE   3,325 0 0
Dominion Energy Inc COM 25746U109 203 2,884 SH   SOLE   2,884 0 0
Dowdupont Inc COM 26078J100 1,188 18,476 SH   SOLE   18,448 0 28
Duke Energy Corp COM 26441C204 228 2,848 SH   SOLE   2,848 0 0
Dunkin Brands Group Inc COM 265504100 46,897 636,151 SH   SOLE   628,881 0 7,270
eBay Inc COM 278642103 621 18,812 SH   SOLE   18,812 0 0
Ecolab Inc COM 278865100 39,052 249,087 SH   SOLE   244,202 0 4,885
Eli Lilly & Co COM 532457108 1,220 11,370 SH   SOLE   10,035 0 1,335
Emerson Elec Co COM 291011104 2,898 37,839 SH   SOLE   36,624 0 1,215
Energy Transfer Equity LP COM 29273V100 209 12,000 SH   SOLE   12,000 0 0
Enterprise Products Partners L COM 293792107 899 31,285 SH   SOLE   26,530 0 4,755
Eog Resources Inc COM 26875P101 393 3,084 SH   SOLE   3,084 0 0
Exxon Mobil Corp COM 30231G102 43,406 510,535 SH   SOLE   494,171 0 16,364
F5 Networks Inc COM 315616102 2,021 10,135 SH   SOLE   9,960 0 175
Facebook Inc-A COM 30303M102 29,068 176,751 SH   SOLE   172,955 0 3,796
Fedex Corp COM 31428X106 226 937 SH   SOLE   930 0 7
Financial Select Sector SPDR COM 81369Y605 275 9,973 SH   SOLE   9,858 0 115
Fortive Corp COM 34959J108 390 4,634 SH   SOLE   4,632 0 2
Gabelli Equity Trust COM 362397101 70 10,740 SH   SOLE   10,740 0 0
General Dynamics Corp COM 369550108 278 1,357 SH   SOLE   1,357 0 0
General Electric Co COM 369604103 661 58,568 SH   SOLE   53,215 0 5,353
Guggenheim S&P 500 Equal Weigh COM 78355W106 1,653 15,477 SH   SOLE   4,597 0 10,880
Harris Corp COM 413875105 290 1,713 SH   SOLE   1,688 0 25
Healthcare Svcs Grp Inc COM 421906108 2,130 52,440 SH   SOLE   51,805 0 635
Henry Schein Inc COM 806407102 38,216 449,437 SH   SOLE   439,529 0 9,908
Hershey Co COM 427866108 23,132 226,789 SH   SOLE   224,964 0 1,825
Hologic Inc COM 436440101 28,217 688,561 SH   SOLE   675,376 0 13,185
Home Depot Inc COM 437076102 14,455 69,779 SH   SOLE   68,071 0 1,708
Honeywell International Inc COM 438516106 3,537 21,258 SH   SOLE   20,740 0 518
Idexx Labs Corp COM 45168D104 39,584 158,550 SH   SOLE   156,045 0 2,505
Illinois Tool Wks Inc COM 452308109 956 6,774 SH   SOLE   6,774 0 0
Intel Corp COM 458140100 1,018 21,520 SH   SOLE   21,310 0 210
Intl Business Machines Corp COM 459200101 2,048 13,545 SH   SOLE   13,273 0 271
Intuit Inc COM 461202103 53,997 237,456 SH   SOLE   235,035 0 2,421
Intuitive Surgical Inc COM 46120E602 377 656 SH   SOLE   656 0 0
iShares Core S&P Mid Cap ETF COM 464287507 14,234 70,713 SH   SOLE   13,733 0 56,980
iShares Core S&P S/C ETF COM 464287804 1,009 11,562 SH   SOLE   8,940 0 2,622
iShares Core S&P500 ETF COM 464287200 909 3,106 SH   SOLE   2,824 0 282
iShares MSCI Emerging Markets COM 464287234 247 5,761 SH   SOLE   4,786 0 975
iShares Russell 1000 ETF COM 464287622 3,053 18,877 SH   SOLE   17,333 0 1,544
iShares Russell 1000 Growth ET COM 464287614 1,026 6,575 SH   SOLE   5,582 0 993
iShares Russell 2000 ETF COM 464287655 1,398 8,293 SH   SOLE   3,358 0 4,935
iShares Russell 3000 Index COM 464287689 83,179 482,760 SH   SOLE   482,682 0 78
iShares Russell M/C ETF COM 464287499 1,166 5,286 SH   SOLE   2,480 0 2,806
iShares Russell M/C Growth ETF COM 464287481 336 2,480 SH   SOLE   2,280 0 200
iShares S&P Midcap 400 Growth COM 464287606 596 2,560 SH   SOLE   2,500 0 60
Jack Henry & Associates Inc COM 426281101 365 2,277 SH   SOLE   2,277 0 0
Johnson & Johnson COM 478160104 48,217 348,969 SH   SOLE   339,469 0 9,500
JP Morgan Chase & Co COM 46625H100 20,811 184,428 SH   SOLE   181,686 0 2,742
Kimberly Clark Corp COM 494368103 2,317 20,390 SH   SOLE   20,390 0 0
Lockheed Martin Corp COM 539830109 904 2,613 SH   SOLE   2,613 0 0
Lowe'S Companies Inc COM 548661107 1,905 16,591 SH   SOLE   15,816 0 775
Magellan Midstream Partners LP COM 559080106 480 7,090 SH   SOLE   6,590 0 500
Mastercard Inc-A COM 57636Q104 258 1,158 SH   SOLE   1,043 0 115
Mccormick & Co Inc COM 579780206 14,074 106,827 SH   SOLE   105,627 0 1,200
McDonalds Corp COM 580135101 3,044 18,193 SH   SOLE   16,932 0 1,261
Medtronic Plc COM G5960L103 34,718 352,937 SH   SOLE   348,098 0 4,839
Merck & Co Inc COM 58933Y105 19,149 269,933 SH   SOLE   263,654 0 6,279
Mettler-Toledo International I COM 592688105 43,725 71,801 SH   SOLE   70,307 0 1,494
Microchip Technology Inc COM 595017104 40,565 514,063 SH   SOLE   505,586 0 8,477
Microsoft Corp COM 594918104 25,562 223,502 SH   SOLE   220,532 0 2,970
Mondelez Intl Inc-A COM 609207105 313 7,283 SH   SOLE   7,193 0 90
Nextera Energy Inc COM 65339F101 259 1,548 SH   SOLE   1,470 0 78
Nike Inc COM 654106103 13,392 158,078 SH   SOLE   154,784 0 3,294
Nordson Corp COM 655663102 15,813 113,844 SH   SOLE   111,674 0 2,170
Norfolk Southern Corp COM 655844108 1,317 7,295 SH   SOLE   6,855 0 440
Northern Trust Corp COM 665859104 24,838 243,199 SH   SOLE   239,432 0 3,767
Northrop Grumman Corp COM 666807102 17,987 56,675 SH   SOLE   56,160 0 515
Novartis Ag ADR COM 66987V109 200 2,326 SH   SOLE   2,326 0 0
Novo-Nordisk A/S ADR COM 670100205 220 4,675 SH   SOLE   4,675 0 0
Occidental Petroleum Corp COM 674599105 249 3,026 SH   SOLE   3,026 0 0
Omnicom Group Inc COM 681919106 1,741 25,598 SH   SOLE   24,573 0 1,025
Oracle Corp COM 68389X105 779 15,106 SH   SOLE   15,101 0 5
Oshkosh Corp COM 688239201 33,831 474,893 SH   SOLE   466,348 0 8,545
Paychex Inc COM 704326107 245 3,325 SH   SOLE   1,325 0 2,000
Pepsico Inc COM 713448108 40,711 364,142 SH   SOLE   358,490 0 5,652
Pfizer Inc COM 717081103 2,181 49,494 SH   SOLE   48,286 0 1,208
Philip Morris Intl Inc COM 718172109 834 10,231 SH   SOLE   9,901 0 330
Phillips 66 COM 718546104 44,960 398,865 SH   SOLE   394,475 0 4,390
PNC Financial Services Group COM 693475105 462 3,393 SH   SOLE   3,393 0 0
Powershares Qqq Nasdaq 100 COM 73935A104 418 2,249 SH   SOLE   2,033 0 216
Praxair Inc COM 74005P104 29,341 182,546 SH   SOLE   179,588 0 2,958
Procter & Gamble Co COM 742718109 8,464 101,697 SH   SOLE   92,829 0 8,868
Prudential Financial Inc COM 744320102 389 3,841 SH   SOLE   3,841 0 0
Qualcomm Inc COM 747525103 23,143 321,300 SH   SOLE   314,527 0 6,773
Raytheon Co COM 755111507 315 1,526 SH   SOLE   1,526 0 0
RBC Bearings Inc COM 75524B104 13,007 86,503 SH   SOLE   84,948 0 1,555
Realty Income Corp COM 756109104 205 3,600 SH   SOLE   3,600 0 0
Red Hat Inc COM 756577102 46,809 343,479 SH   SOLE   338,240 0 5,239
Rockwell Automation Corp COM 773903109 15,488 82,596 SH   SOLE   81,521 0 1,075
Roper Technologies Inc COM 776696106 45,029 152,018 SH   SOLE   149,055 0 2,963
Royal Dutch Shell ADR-A COM 780259206 892 13,095 SH   SOLE   12,915 0 180
SBA Communications Corp-Reit COM 78410G104 274 1,705 SH   SOLE   1,705 0 0
Schlumberger Ltd COM 806857108 10,602 174,035 SH   SOLE   170,713 0 3,322
Seagate Technology COM G7945M107 247 5,210 SH   SOLE   5,210 0 0
Sherwin Williams Co COM 824348106 19,901 43,719 SH   SOLE   43,081 0 638
Sirius XM Holdings Inc COM 82968B103 73 11,500 SH   SOLE   11,500 0 0
Smucker J M Co COM 832696405 556 5,418 SH   SOLE   5,418 0 0
SPDR S&P 500 ETF Trust COM 78462F103 11,105 38,198 SH   SOLE   8,972 0 29,226
SPDR S&P M/C 400 ETF COM 78467Y107 1,999 5,441 SH   SOLE   1,338 0 4,103
Starbucks Corp COM 855244109 12,495 219,823 SH   SOLE   216,794 0 3,029
Stryker Corp COM 863667101 26,901 151,399 SH   SOLE   148,624 0 2,775
Sysco Corp COM 871829107 333 4,550 SH   SOLE   4,550 0 0
T Rowe Price Group Inc COM 74144T108 20,413 186,964 SH   SOLE   183,968 0 2,996
Teleflex Inc COM 879369106 20,280 76,213 SH   SOLE   75,088 0 1,125
Thermo Fisher Scientific Inc COM 883556102 39,479 161,748 SH   SOLE   159,957 0 1,791
TJX Companies Inc COM 872540109 45,536 406,501 SH   SOLE   399,816 0 6,685
Toll Brothers Inc COM 889478103 16,364 495,417 SH   SOLE   490,872 0 4,545
Torchmark Corp COM 891027104 11,472 132,334 SH   SOLE   129,977 0 2,357
Toronto-Dominion Bank COM 891160509 864 14,209 SH   SOLE   14,209 0 0
Total SA ADR COM 89151E109 495 7,688 SH   SOLE   7,538 0 150
Tractor Supply Company COM 892356106 5,540 60,962 SH   SOLE   59,337 0 1,625
Transcanada Corp COM 89353D107 202 5,000 SH   SOLE   5,000 0 0
Travelers Companies Inc COM 89417E109 552 4,253 SH   SOLE   4,241 0 12
Unilever NV-NY Shares COM 904784709 469 8,445 SH   SOLE   8,445 0 0
Unilever Plc ADR COM 904767704 33,916 616,993 SH   SOLE   607,505 0 9,488
Union Pacific Corp COM 907818108 21,087 129,504 SH   SOLE   126,780 0 2,724
United Parcel Service Inc-B COM 911312106 265 2,268 SH   SOLE   2,268 0 0
United Technologies Corp COM 913017109 39,804 284,699 SH   SOLE   277,912 0 6,787
Unitedhealth Group Inc COM 91324P102 13,562 50,977 SH   SOLE   50,617 0 360
Unum Group COM 91529Y106 374 9,581 SH   SOLE   9,574 0 7
US Bancorp COM 902973304 43,208 818,181 SH   SOLE   803,221 0 14,960
Valero Energy Corp COM 91913Y100 352 3,093 SH   SOLE   3,093 0 0
Vanguard Growth ETF COM 922908736 214 1,327 SH   SOLE   1,065 0 262
Vanguard REIT ETF COM 922908553 270 3,352 SH   SOLE   2,820 0 532
Vanguard S&P 500 ETF COM 922908363 789 2,953 SH   SOLE   2,769 0 184
Vanguard S/C ETF COM 922908751 1,772 10,899 SH   SOLE   1,912 0 8,987
Vanguard Total Stock Mkt ETF COM 922908769 3,582 23,936 SH   SOLE   8,714 0 15,222
Verizon Communications Inc COM 92343V104 1,625 30,442 SH   SOLE   29,468 0 974
VF Corp COM 918204108 6,737 72,090 SH   SOLE   71,705 0 385
Visa Inc-A COM 92826C839 44,192 294,436 SH   SOLE   291,665 0 2,771
Vulcan Materials Co COM 929160109 1,676 15,075 SH   SOLE   15,075 0 0
Wal-Mart Stores Inc COM 931142103 249 2,650 SH   SOLE   2,650 0 0
Walgreens Boots Alliance Inc COM 931427108 364 5,000 SH   SOLE   5,000 0 0
Walt Disney Co COM 254687106 42,427 362,809 SH   SOLE   356,867 0 5,942
Waste Connections Inc COM 94106B101 61,799 774,709 SH   SOLE   761,992 0 12,717
Waste Management Inc COM 94106L109 355 3,929 SH   SOLE   3,929 0 0
Wells Fargo Co COM 949746101 357 6,800 SH   SOLE   5,640 0 1,160
Weyerhaeuser Co COM 962166104 4,849 150,274 SH   SOLE   148,094 0 2,180
Xylem Inc COM 98419M100 638 7,990 SH   SOLE   7,990 0 0
Yum Brands Inc COM 988498101 1,765 19,420 SH   SOLE   19,320 0 100
Yum China Holdings Inc COM 98850P109 704 20,040 SH   SOLE   20,040 0 0
Zimmer Biomet Holdings Inc COM 98956P102 353 2,683 SH   SOLE   2,523 0 160
iShares MSCI EAFE ETF INTL 464287465 6,117 89,964 SH   SOLE   85,495 0 4,469
Vanguard FTSE All World Ex-US INTL 922042775 29,642 569,486 SH   SOLE   536,594 0 32,892
Vanguard FTSE Developed Market INTL 921943858 61,317 1,417,088 SH   SOLE   1,389,706 0 27,382
Vanguard FTSE EM ETF INTL 922042858 19,501 475,643 SH   SOLE   446,519 0 29,124
Wells Fargo New PERP PFD CNV A 949746804 258 200 SH   SOLE   200 0 0
Aberdeen Asia Pacific Income F BOND FUND 003009107 96 23,262 SH   SOLE   23,262 0 0
Invesco Bulletshares 2018 Corp BOND FUND 46138J106 522 24,675 SH   SOLE   21,075 0 3,600
Invesco Bulletshares 2019 Corp BOND FUND 46138J304 1,993 94,546 SH   SOLE   72,656 0 21,890
Invesco Bulletshares 2020 Corp BOND FUND 46138J502 2,596 123,136 SH   SOLE   102,466 0 20,670
Invesco Bulletshares 2021 Corp BOND FUND 46138J700 3,104 149,668 SH   SOLE   101,930 0 47,738
Invesco Bulletshares 2022 Corp BOND FUND 46138J882 3,198 154,835 SH   SOLE   105,377 0 49,458
Invesco Bulletshares 2023 Corp BOND FUND 46138J866 2,326 115,039 SH   SOLE   73,745 0 41,294
iShares I/T Corporate Bond ETF BOND FUND 464288638 916 17,253 SH   SOLE   14,912 0 2,341
iShares S/T Corporate Bond ETF BOND FUND 464288646 2,313 44,621 SH   SOLE   40,421 0 4,200
Pimco S/T Muni Bond ETF BOND FUND 72201R874 365 7,350 SH   SOLE   6,850 0 500
Vanguard Total Bond Mkt ETF BOND FUND 921937835 542 6,884 SH   SOLE   1,115 0 5,769
Western Asset High Income Opp BOND FUND 95766K109 64 13,419 SH   SOLE   13,419 0 0