Quarterly Results of Operations (UNAUDITED)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)

	As adjusted for impact of the change to FIFO
(Dollars in thousands, except per share amounts)	2015
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales	$	165,051	$	163,098	$	160,366	$	152,928
Gross margin	$	62,425	$	60,661	$	59,672	$	52,604
Net income	$	13,643	$	13,554	$	12,546	$	6,577
Net income per share:
Basic	$	0.74	$	0.73	$	0.68	$	0.37
Diluted	$	0.72	$	0.71	$	0.67	$	0.37
	2014
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales	$	146,640	$	153,495	$	163,052	$	147,724
Gross margin	$	54,107	$	57,376	$	64,576	$	58,695
Net income	$	14,702	$	11,056	$	20,407	$	7,247
Net income per share:
Basic	$	0.82	$	0.61	$	1.12	$	0.40
Diluted	$	0.79	$	0.59	$	1.09	$	0.39

	As originally reported
(Dollars in thousands, except per share amounts)	2015
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales	$	165,051	$	163,098	$	160,366	$	152,928
Gross margin	$	62,355	$	60,589	$	59,530	$	52,604
Net income	$	13,627	$	13,540	$	12,455	$	6,577
Net income per share:
Basic	$	0.74	$	0.73	$	0.68	$	0.37
Diluted	$	0.72	$	0.71	$	0.67	$	0.37
	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
Net income	$	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