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
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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 1,650 10,000 SH   SOLE   10,000 0 0
Advantage Oil & Gas Ltd. COM 00765F101 34,065 6,326,708 SH   SOLE   6,294,608 0 32,100
Allison Transmission Holdings Inc. COM 01973R101 78,684 2,463,490 SH   SOLE   2,424,948 0 38,542
Altria Group Inc. COM 02209S103 1,003 20,048 SH   SOLE   20,048 0 0
American Capital, Ltd. COM 02503Y103 4,730 319,833 SH   SOLE   310,064 0 9,769
American Homes 4 Rent Real Estate Investment Trust COM 02665T306 64,250 3,882,191 SH   SOLE   2,672,141 0 1,210,050
AmerisourceBergen Corp. COM 03073E105 235,634 2,072,963 SH   SOLE   2,042,462 0 30,501
Apple Inc. COM 037833100 227,492 1,822,487 SH   SOLE   1,802,414 0 20,073
Ares Capital Corp. COM 04010L103 65,839 3,834,536 SH   SOLE   2,460,405 0 1,374,131
Argo Group International Holdings Ltd. COM G0464B107 4,710 93,919 SH   SOLE   90,885 0 3,034
Arthur J. Gallagher & Co. COM 363576109 70,248 1,502,621 SH   SOLE   958,367 0 544,254
AutoZone, Inc. COM 053332102 49,691 72,844 SH   SOLE   71,722 0 1,122
Bank of Montreal COM 063671101 1,198 20,000 SH   SOLE   20,000 0 0
Bank of Nova Scotia COM 064149107 182,587 3,639,742 SH   SOLE   3,589,013 0 50,729
BB&T Corp. COM 054937107 281,575 7,218,003 SH   SOLE   7,137,623 0 80,380
Becton, Dickinson & Co. COM 075887109 115,552 804,737 SH   SOLE   792,549 0 12,188
Berkshire Hathaway Inc. CL A 084670108 59,595 274 SH   SOLE   272 0 2
Berkshire Hathaway Inc. CL B 084670702 7,809 54,110 SH   SOLE   45,546 0 8,564
Booz Allen Hamilton Holding Corp. COM 099502106 61,313 2,118,609 SH   SOLE   1,446,706 0 671,903
Brookfield Asset Management Inc. CL A 112585104 1,043 19,500 SH   SOLE   19,500 0 0
Brookfield Infrastructure Partners LP COM G16252101 20,737 455,449 SH   SOLE   401,448 0 54,001
Brown & Brown Inc. COM 115236101 54,797 1,654,994 SH   SOLE   1,049,746 0 605,248
Canadian National Railway Co. COM 136375102 198,256 2,960,577 SH   SOLE   2,930,577 0 30,000
Canadian Natural Resources Ltd. COM 136385101 209,118 6,823,118 SH   SOLE   6,800,856 0 22,262
CBIZ Inc. COM 124805102 44,501 4,769,721 SH   SOLE   3,131,365 0 1,638,356
Cenovus Energy Inc. COM 15135U109 280,568 16,595,294 SH   SOLE   16,533,780 0 61,514
Cisco Systems Inc. COM 17275R102 208,031 7,597,530 SH   SOLE   7,512,914 0 84,616
Coca-Cola Femsa S.A.B. de C.V. SPONSORED ADR 191241108 14,546 182,142 SH   SOLE   182,142 0 0
Computer Programs and Systems Inc. COM 205306103 35,524 654,692 SH   SOLE   414,268 0 240,424
Copart Inc. COM 217204106 5,805 154,509 SH   SOLE   149,739 0 4,770
Corporate Executive Board Co. COM 21988R102 72,205 904,148 SH   SOLE   569,446 0 334,702
Cumulus Media Inc. CL A 231082108 23,798 9,634,886 SH   SOLE   9,634,886 0 0
DeVry Education Group Inc. COM 251893103 72,501 2,173,299 SH   SOLE   1,411,916 0 761,383
Diageo PLC SPONSORED ADR 25243Q205 524 4,736 SH   SOLE   4,736 0 0
Eaton Vance Variable Rate Income Trust COM 278279104 11,348 777,790 SH   SOLE   777,790 0 0
Enbridge Inc. COM 29250N105 502 10,421 SH   SOLE   10,421 0 0
Entercom Communications Corp. CL A 293639100 6,827 561,861 SH   SOLE   561,861 0 0
Equifax Inc. COM 294429105 287,338 3,089,657 SH   SOLE   2,478,796 0 610,861
Expedia Inc. COM 30212P303 31,689 336,651 SH   SOLE   336,651 0 0
Expeditors International of Washington, Inc. COM 302130109 2,580 53,542 SH   SOLE   51,858 0 1,684
Federated Investors Inc. CL B 314211103 53,480 1,578,045 SH   SOLE   1,054,933 0 523,112
FirstService Corp. SUB VTG SH 33761N109 11,015 170,200 SH   SOLE   170,200 0 0
Generac Holdings Inc. COM 368736104 52,766 1,083,720 SH   SOLE   740,420 0 343,300
General Electric Co. COM 369604103 1,241 50,000 SH   SOLE   50,000 0 0
Gentex Corp. COM 371901109 177,883 9,720,408 SH   SOLE   7,644,955 0 2,075,453
Graco Inc. COM 384109104 37,907 525,321 SH   SOLE   340,763 0 184,558
HCC Insurance Holdings Inc. COM 404132102 81,746 1,442,493 SH   SOLE   870,648 0 571,845
Hilltop Holdings Inc. COM 432748101 58,136 2,990,531 SH   SOLE   1,834,849 0 1,155,682
Hornbeck Offshore Services, Inc. COM 440543106 3,166 168,319 SH   SOLE   162,857 0 5,462
Humana Inc. COM 444859102 159,600 896,528 SH   SOLE   883,649 0 12,879
Jacobs Engineering Group Inc. COM 469814107 108,232 2,396,643 SH   SOLE   2,063,149 0 333,494
Johnson & Johnson COM 478160104 278,530 2,762,011 SH   SOLE   2,729,078 0 32,933
Kayne Anderson Energy Development Co. COM 48660Q102 25,547 876,391 SH   SOLE   546,983 0 329,408
Kraft Foods Group Inc. COM 50076Q106 1,307 15,000 SH   SOLE   15,000 0 0
Laboratory Corporation of America Holdings COM 50540R409 4,753 37,697 SH   SOLE   36,504 0 1,193
Leucadia National Corp. COM 527288104 146,431 6,569,380 SH   SOLE   5,606,185 0 963,195
LoJack Corp. COM 539451104 290 101,544 SH   SOLE   101,544 0 0
Lorillard Inc. COM 544147101 126,353 1,933,479 SH   SOLE   1,902,285 0 31,194
Madison Square Garden Co. COM 55826P100 58,981 696,765 SH   SOLE   470,599 0 226,166
Main Street Capital Corp. COM 56035L104 48,491 1,569,277 SH   SOLE   991,269 0 578,008
MarketAxess Holdings Inc. COM 57060D108 127,648 1,539,784 SH   SOLE   900,546 0 639,238
McCormick & Co., Inc. COM 579780206 4,743 61,512 SH   SOLE   61,512 0 0
McDonald's Corp. COM 580135101 141,299 1,450,112 SH   SOLE   1,428,365 0 21,747
Merck & Co., Inc. COM 58933Y105 518 9,015 SH   SOLE   9,015 0 0
Microsoft Corp. COM 594918104 127,924 3,146,571 SH   SOLE   3,099,158 0 47,413
Mondelez International Inc. COM 609207105 541 15,000 SH   SOLE   15,000 0 0
Moody's Corp. COM 615369105 3,258 31,391 SH   SOLE   30,502 0 889
Morgan Stanley COM 617446448 1,287 36,047 SH   SOLE   36,047 0 0
MSCI Inc. COM 55354G100 97,054 1,582,997 SH   SOLE   1,023,698 0 559,299
Northern Trust Corp. COM 665859104 136,472 1,959,390 SH   SOLE   1,929,503 0 29,887
Nutraceutical International Corp. COM 67060Y101 19,848 1,007,537 SH   SOLE   622,995 0 384,542
Occidental Petroleum Corp. COM 674599105 217,424 2,965,327 SH   SOLE   2,932,637 0 32,690
Oracle Corp. COM 68389X105 268,815 6,217,228 SH   SOLE   6,144,145 0 73,083
Penske Auto Group Inc. COM 70959W103 110,008 2,136,495 SH   SOLE   1,359,175 0 777,320
PepsiCo Inc. COM 713448108 197,183 2,056,183 SH   SOLE   2,034,518 0 21,665
Philip Morris International Inc. COM 718172109 246,959 3,258,661 SH   SOLE   3,219,413 0 39,248
Potash Corporation of Saskatchewan Inc. COM 73755L107 250,769 7,779,344 SH   SOLE   7,676,544 0 102,800
Premier Inc. CL A 74051N102 7,212 191,911 SH   SOLE   185,856 0 6,055
Primerica Inc. COM 74164M108 94,383 1,854,279 SH   SOLE   1,215,051 0 639,228
Procter & Gamble Co. COM 742718109 44,651 544,924 SH   SOLE   537,183 0 7,741
Radio One Inc. CL D 75040P405 95 30,929 SH   SOLE   30,929 0 0
RE/MAX Holdings Inc. COM 75524W108 49,406 1,487,682 SH   SOLE   1,034,288 0 453,394
Ritchie Bros. Auctioneers Inc. COM 767744105 158,597 6,359,160 SH   SOLE   6,272,442 0 86,718
Rogers Communications Inc. CL B 775109200 90,545 2,704,865 SH   SOLE   2,658,079 0 46,786
Royal Bank of Canada COM 780087102 192,128 3,191,945 SH   SOLE   3,144,645 0 47,300
Shaw Communications Inc. CL B 82028K200 105,045 4,681,644 SH   SOLE   4,619,598 0 62,046
SS&C Technologies Holdings Inc. COM 78467J100 95,762 1,537,112 SH   SOLE   1,047,882 0 489,230
Strayer Education Inc. COM 863236105 23,866 446,838 SH   SOLE   334,494 0 112,344
Synnex Corp. COM 87162W100 72,441 937,742 SH   SOLE   603,062 0 334,680
Tech Data Corp. COM 878237106 48,106 832,710 SH   SOLE   464,882 0 367,828
Teleflex Inc. COM 879369106 29,660 245,469 SH   SOLE   153,465 0 92,004
TeleTech Holdings Inc. COM 879939106 7,433 292,076 SH   SOLE   282,570 0 9,506
The Babcock & Wilcox Co. COM 05615F102 165,379 5,153,589 SH   SOLE   5,070,392 0 83,197
Thomson Reuters Corp. COM 884903105 225,419 5,560,299 SH   SOLE   5,488,257 0 72,042
Toronto-Dominion Bank COM 891160509 189,370 4,424,666 SH   SOLE   4,359,210 0 65,456
Tronox Ltd. CL A Q9235V101 25,159 1,237,521 SH   SOLE   1,105,432 0 132,089
U.S. Concrete Inc. COM 90333L201 615 18,161 SH   SOLE   18,161 0 0
Union Pacific Corp. COM 907818108 268,559 2,466,878 SH   SOLE   2,439,014 0 27,864
United Technologies Corp. COM 913017109 279,886 2,378,228 SH   SOLE   2,349,625 0 28,603
Waddell & Reed Financial, Inc. COM 930059100 13,696 276,473 SH   SOLE   199,457 0 77,016
Walgreens Boots Alliance, Inc. COM 931427108 323,102 3,817,420 SH   SOLE   3,772,551 0 44,869
White Mountains Insurance Group Ltd. COM G9618E107 7,686 11,228 SH   SOLE   10,876 0 352