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Consolidated Statements of Operations and Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Statement [Abstract]      
Net revenue $ 1,336,432 $ 1,132,927 $ 862,980
Cost of sales 964,841 808,901 610,532
Gross profit 371,591 324,026 252,448
Operating expenses      
Selling 67,105 58,450 49,667
Administrative 185,850 164,453 125,472
Amortization 25,419 26,857 11,259
Operating income 93,217 74,266 66,050
Other expense      
Interest expense, net 20,496 17,381 6,177
Other 535 1,065 263
Income before income taxes 72,186 55,820 59,610
Income tax provision 17,438 14,680 21,174
Net income 54,748 41,140 38,436
Other comprehensive (loss) income, net of tax:      
Unrealized (loss) gain on cash flow hedge, net of tax benefit (provision) of $284, $(206) and $0 for the twelve months ended December 31, 2018, 2017 and 2016, respectively (1,050) 507  
Comprehensive income $ 53,698 $ 41,647 $ 38,436
Basic net income per share $ 1.76 $ 1.30 $ 1.23
Diluted net income per share $ 1.75 $ 1.30 $ 1.23
Weighted average shares outstanding:      
Basic 31,107,231 31,639,283 31,301,887
Diluted 31,229,558 31,756,363 31,363,290