Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of Selected Quarterly Financial Data

Selected quarterly financial data for 2011 and 2012 are as follows:

	Three Months Ended
	March		June		September		December
2011
Net sales	$	183,450	$	183,236	$	172,814	$	185,577
Gross profit	95,716		91,455		91,311		96,452
Net income (loss)	8,995		8,680		8,211		(25,134		)
EPS:
Basic	.32		.31		.29		(.90		)
Diluted	.31		.30		.29		(.90		)

	Three Months Ended
	March		June		September		December
2012
Net sales	$	194,316	$	189,695	$	181,885	$	201,244
Gross profit	100,911		99,732		97,913		107,287
Net income	9,968		10,296		9,320		10,897
EPS:
Basic	.36		.36		.33		.38
Diluted	.35		.36		.32		.38