ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2012 Foreign Currency Translation Adjustment	Mar. 31, 2013 Foreign Currency Translation Adjustment	Dec. 31, 2012 Foreign Currency Translation Adjustment	Mar. 31, 2013 Pension and Other Post-Retirement Liability Adjustment	Mar. 31, 2013 Change in the fair value of interest rate swap contracts
Changes in accumulated other comprehensive loss components
Balance at the beginning of the period	$ (24,880)			$ 18,553	$ 21,078	$ (45,958)	$ (24,880)
Other comprehensive income before reclassifications			(2,525)			43	(2,482)
Amounts reclassified from accumulated other comprehensive income, net of tax						913	913
Total other comprehensive income (loss)	(1,569)	2,647	(2,525)			956	(1,569)
Balance at the end of the period	$ (26,449)			$ 18,553	$ 21,078	$ (45,002)	$ (26,449)