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Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Revenues: |  |  |  |
New and used truck sales | $ 846,256 | $ 615,616 | $ 2,244,447 | $ 1,613,420
Parts and service | 340,632 | 257,512 | 980,588 | 731,919
Lease and rental | 45,114 | 32,668 | 130,160 | 94,166
Finance and insurance | 5,227 | 4,333 | 14,559 | 11,304
Other | 3,793 | 2,935 | 12,396 | 8,717
Total revenue | 1,241,022 | 913,064 | 3,382,150 | 2,459,526
Cost of products sold: |  |  |  |
New and used truck sales | 787,952 | 573,657 | 2,084,945 | 1,499,384
Parts and service | 216,067 | 161,209 | 626,786 | 459,371
Lease and rental | 38,264 | 27,886 | 112,406 | 78,983
Total cost of products sold | 1,042,283 | 762,752 | 2,824,137 | 2,037,738
Gross profit | 198,739 | 150,312 | 558,013 | 421,788
Selling, general and administrative | 148,238 | 114,863 | 431,943 | 335,597
Depreciation and amortization | 9,488 | 7,569 | 27,483 | 21,938
Gain (loss) on sale of assets | 5 | (10) | 109 | 19
Operating income | 41,018 | 27,870 | 98,696 | 64,272
Interest expense, net | 2,689 | 2,781 | 8,363 | 7,774
Income from before taxes | 38,329 | 25,089 | 90,333 | 56,498
Provision for income taxes | 14,851 | 9,910 | 35,003 | 22,140
Net income | 23,478 | 15,179 | 55,330 | 34,358
Earnings per common share: |  |  |  |
Basic (in Dollars per share) | $ 0.59 | $ 0.38 | $ 1.39 | $ 0.87
Diluted (in Dollars per share) | $ 0.57 | $ 0.37 | $ 1.36 | $ 0.85
Weighted average shares outstanding: |  |  |  |
Basic (in Shares) | 40,008 | 39,558 | 39,700 | 39,411
Diluted (in Shares) | 41,091 | 40,623 | 40,820 | 40,492
Comprehensive income | $ 23,610 | $ 15,280 | $ 55,892 | $ 34,783

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