Summarized Quarterly Results of Operations (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 158,271,000	$ 162,109,000	$ 152,784,000	$ 150,485,000	$ 144,724,000	$ 141,442,000	$ 153,623,000	$ 144,944,000	$ 623,649,000	$ 584,733,000	$ 545,572,000
Gross Profit	36,715,000	39,961,000	42,532,000	42,071,000	39,943,000	42,518,000	45,008,000	42,085,000	161,279,000	169,554,000	163,899,000
Income (Loss) from Continuing Operations Attributable to Parent	1,489,000	(3,618,000)	6,327,000	4,763,000	6,382,000	6,859,000	7,405,000	5,796,000	8,961,000	26,442,000	26,507,000
Income (loss) from discontinued operations	(13,856,000)	875,000	(578,000)	(4,083,000)	(3,063,000)	(371,000)	907,000	2,087,000	(17,642,000)	(440,000)	3,455,000
Net Income (Loss) Attributable to Parent	(12,367,000)	(2,743,000)	5,749,000	680,000	3,319,000	6,488,000	8,312,000	7,883,000	(8,681,000)	26,002,000	29,962,000
Basic (in dollars per share)	$ 0.05	$ (0.11)	$ 0.20	$ 0.14	$ 0.19	$ 0.20	$ 0.22	$ 0.18	$ 0.28	$ 0.78	$ 0.79
Diluted (in dollars per share)	$ 0.05	$ (0.11)	$ 0.19	$ 0.14	$ 0.19	$ 0.20	$ 0.22	$ 0.17	$ 0.27	$ 0.77	$ 0.78
Basic (in dollars per share)	$ (0.44)	$ 0.02	$ (0.02)	$ (0.12)	$ (0.09)	$ (0.01)	$ 0.03	$ 0.06	$ (0.55)	$ (0.01)	$ 0.10
Diluted (in dollars per share)	$ (0.44)	$ 0.02	$ (0.02)	$ (0.12)	$ (0.09)	$ (0.01)	$ 0.03	$ 0.06	$ (0.54)	$ (0.01)	$ 0.10
Basic (in dollars per share)	$ (0.39)	$ (0.09)	$ 0.18	$ 0.02	$ 0.10	$ 0.19	$ 0.25	$ 0.24	$ (0.27)	$ 0.77	$ 0.89
Diluted (in dollars per share)	$ (0.39)	$ (0.09)	$ 0.17	$ 0.02	$ 0.10	$ 0.19	$ 0.25	$ 0.23	$ (0.27)	$ 0.76	$ 0.88
Adjustment to inventory and fixed asset	3,200,000.0								1,800,000
Impairment charge for assets held for sale	$ 18,900,000