Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net revenue	$ 862,980	$ 662,719	$ 518,020
Cost of sales	610,532	474,426	377,968
Gross profit	252,448	188,293	140,052
Operating expenses
Selling	49,667	37,702	30,951
Administrative	125,472	99,375	80,678
Amortization	11,259	6,264	2,837
Operating income	66,050	44,952	25,586
Other expense (income)
Interest expense	6,177	3,738	3,166
Other	263	(716)	(167)
Income before income taxes	59,610	41,930	22,587
Income tax provision	21,174	15,413	8,607
Net income from continuing operations	38,436	26,517	13,980
Discontinued operations
Loss from discontinued operations			78
Income tax benefit			(30)
Loss from discontinued operations, net of income taxes			48
Net income	38,436	26,517	13,932
Net income (loss) attributable to common stockholders	$ 38,436	$ 26,517	$ (5,965)
Basic and diluted net income (loss) per share attributable to common stockholders	$ 1.23	$ 0.85	$ (0.20)
Weighted average shares outstanding:
Basic	31,301,887	31,298,163	30,106,862
Diluted	31,363,290	31,334,569	30,106,862
Redeemable Preferred Stock [Member]
Discontinued operations
Accretion charges on redeemable preferred stock			$ (19,897)