SUMMARIZED QUARTERLY FINANCIAL DATA - Unaudited (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Statement Abstract
Income Tax Expense (Benefit)	$ 4,980	$ 5,373	$ 11,605	$ 13,080
Net income (loss)	6,473	6,875	15,973	16,517	26,024
Quarterly Financial Information Disclosure Abstract
Sales Revenue, Net	99,840	98,436	278,276	278,035
Operating Income Loss	21,205	23,286	57,045	63,326
Net Income (Loss) Attributable to Parent	$ 6,473	$ 6,875	$ 15,973	$ 16,517	$ 26,024
Weighted average basic common shares outstanding	37,692,848	37,385,753	37,685,754	37,334,620
Weighted Average Number Of Diluted Shares Outstanding	38,482,073	38,153,422	38,522,122	38,208,979