QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - Summary of the unaudited quarterly financial information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 82,403	$ 77,957	$ 87,346	$ 94,957	$ 109,391	$ 96,777	$ 97,566	$ 108,925	$ 342,663	$ 412,659	$ 306,897
Operating Income	2,773	2,534	3,361	3,882	8,195	8,139	9,777	12,584	12,550	38,695
Net Income	$ 1,676	$ 2,890	$ 2,546	$ 2,010	$ 4,917	$ 4,871	$ 5,776	$ 7,444	$ 9,122	$ 23,008	$ 11,707
Basic Income Per Share (in dollars per share)	$ 0.15	$ 0.26	$ 0.23	$ 0.18	$ 0.44	$ 0.42	$ 0.49	$ 0.63	$ 0.82	$ 1.98	$ 1.00
Diluted Income Per Share (in dollars per share)	$ 0.15	$ 0.26	$ 0.23	$ 0.18	$ 0.43	$ 0.41	$ 0.47	$ 0.61	$ 0.82	$ 1.92	$ 0.96
CASH DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.13	$ 0.13	$ 0.13	$ 0.13	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.52	$ 0.48	$ 0.10