Quarterly Results of Operations (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Quarterly financial information

(Dollars in thousands, except per share amounts)	2014
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales	$	146,640	$	153,495	$	163,052	$	147,724
Gross margin	53,919		57,138		64,548		58,335
Income (loss) from continuing operations	14,580		10,902		20,388		7,013
Net income per share:
Basic	$	0.81	$	0.60	$	1.12	$	0.38
Diluted	0.79		0.58		1.09		0.37
	2013
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales	$	125,979	$	132,452	$	142,820	$	136,231
Gross margin	41,289		44,429		51,186		50,796
Income (loss) from continuing operations	6,976		5,583		13,572		11,528
Net income per share:
Basic	$	0.41	$	0.33	$	0.79	$	0.66
Diluted	0.39		0.32		0.76		0.64