Consolidated Statements of Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 623,649	$ 584,733	$ 545,572
Cost of sales	462,370	415,179	381,673
Gross profit	161,279	169,554	163,899
Selling expenses	60,261	55,398	51,227
General and administrative expenses	78,400	69,840	66,146
Operating Expenses	138,661	125,238	117,373
Operating income	22,618	44,316	46,526
Interest
Income	(127)	(213)	(164)
Expense	8,662	4,744	4,494
Interest expense-net	8,535	4,531	4,330
Income from continuing operations before income taxes	14,083	39,785	42,196
Income tax expense	5,122	13,343	15,689
Income (Loss) from Continuing Operations Attributable to Parent	8,961	26,442	26,507
Income (loss) from discontinued operations	(17,642)	(440)	3,455
Net income (loss)	$ (8,681)	$ 26,002	$ 29,962
Income per common share from continuing operations:
Basic (in dollars per share)	$ 0.28	$ 0.78	$ 0.79
Diluted (in dollars per share)	$ 0.27	$ 0.77	$ 0.78
Income (loss) per common share from discontinued operations:
Basic (in dollars per share)	$ (0.55)	$ (0.01)	$ 0.10
Diluted (in dollars per share)	$ (0.54)	$ (0.01)	$ 0.10
Net income (loss) per share:
Basic (in dollars per share)	$ (0.27)	$ 0.77	$ 0.89
Diluted (in dollars per share)	$ (0.27)	$ 0.76	$ 0.88
Dividends declared per share (in dollars per share)	$ 0.52	$ 0.36	$ 0.32