QUARTERLY RESULTS (UNAUDITED) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 230,872,000	$ 216,898,000	$ 214,312,000	$ 200,586,000	$ 250,026,000	$ 219,794,000	$ 221,018,000	$ 196,662,000	$ 862,668,000	$ 887,499,000	$ 922,200,000
Gross Profit	74,429,000	72,339,000	69,881,000	63,627,000	82,675,000	74,216,000	74,407,000	63,053,000	280,275,000	294,350,000	294,397,000
Net Income	634,000	8,550,000	7,888,000	6,074,000	17,492,000	12,197,000	13,055,000	7,257,000	23,146,000	50,001,000	58,011,000
Earnings per share - Basic (in dollars per share)	$ 0.01	$ 0.18	$ 0.17	$ 0.13	$ 0.37	$ 0.26	$ 0.28	$ 0.16	$ 0.49	$ 1.07	$ 1.25
Earnings per share - Diluted (in dollars per share)	$ 0.01	$ 0.18	$ 0.17	$ 0.13	$ 0.37	$ 0.26	$ 0.28	$ 0.15	$ 0.49	$ 1.06	$ 1.24
Intangible asset impairment charge	8,900,000								8,900,000	0	0
Restructuring charges	$ 5,700,000								$ 5,700,000		$ 800,000	$ 7,600,000