Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Selected Quarterly Financial Data

Selected quarterly financial data for 2016 and 2015 are as follows:

	Three Months Ended
	March			June		September		December
2016
Net sales	$	181,201		$	193,433	$	184,792	$	204,094
Gross profit	97,740			102,422		101,209		106,959
Net income (loss)	(2,265		)	2,884		7,337		6,708
EPS:
Basic	$	(.08	)	$	.10	$	.26	$	.24
Diluted	(.08		)	.10		.26		.24

	Three Months Ended
	March		June		September		December
2015
Net sales	$	177,940	$	181,027	$	169,184	$	191,017
Gross profit	92,282		93,498		93,546		102,376
Net income	6,312		7,461		8,873		7,852
EPS:
Basic	$	.23	$	.27	$	.32	$	.28
Diluted	.23		.27		.32		.28