CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net sales	$ 358,540	$ 354,060	$ 1,006,225	$ 978,629
Cost of goods sold	269,401	269,668	759,354	746,781
Gross profit	89,139	84,392	246,871	231,848
Selling, general and administrative expenses	75,286	73,665	219,866	211,878
Depreciation expense	2,493	1,681	6,811	4,790
Amortization expense	596	563	1,756	1,690
Impairment of assets held for sale	0	0	0	48
Merger-related costs	1,183	0	4,652	0
Public offering transaction-related costs	0	60	0	508
Restructuring expense	(14)	2	383	11
Total operating expenses	79,544	75,971	233,468	218,925
Income from operations	9,595	8,421	13,403	12,923
Other income (expense)
Interest expense	(745)	(712)	(2,133)	(2,011)
Other income, net	194	197	1,002	610
Income from continuing operations before income taxes	9,044	7,906	12,272	11,522
Income tax expense	3,020	2,972	1,866	4,417
Income from continuing operations	6,024	4,934	10,406	7,105
Income from discontinued operations, net of income tax expense of $4, $25, $33 and $133, respectively	7	40	54	208
Net income	$ 6,031	$ 4,974	$ 10,460	$ 7,313
Weighted average common shares outstanding
Basic (in shares)	26,123,202	25,733,833	26,104,425	25,713,688
Diluted (in shares)	26,354,070	26,229,323	26,317,488	26,218,405
Basic income (loss) per share
Income from continuing operations (in dollars per share)	$ 0.23	$ 0.19	$ 0.40	$ 0.27
Income from discontinued operations (in dollars per share)	0.00	0.00	0.00	0.01
Net income per share (in dollars per share)	0.23	0.19	0.40	0.28
Diluted income (loss) per share
Income from continuing operations (in dollars per share)	0.23	0.19	0.40	0.27
Income from discontinued operations (in dollars per share)	0.00	0.00	0.00	0.01
Net income per share (in dollars per share)	$ 0.23	$ 0.19	$ 0.40	$ 0.28