ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Changes in accumulated other comprehensive loss components
Balance, as of December 31, 2014	$ (32,682)
Other comprehensive income (loss) before reclassifications	(12,999)
Amounts reclassified from accumulated other comprehensive income (loss)	1,382
Total other comprehensive loss, net of tax	(11,617)	(3,755)
Balance, as of March 31, 2015	(44,299)
Foreign Currency Translation Adjustment
Changes in accumulated other comprehensive loss components
Balance, as of December 31, 2014	2,095
Other comprehensive income (loss) before reclassifications	(12,999)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Total other comprehensive loss, net of tax	(12,999)
Balance, as of March 31, 2015	(10,904)
Pension and Other Post- Retirement Liability Adjustment
Changes in accumulated other comprehensive loss components
Balance, as of December 31, 2014	(34,777)
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	1,382
Total other comprehensive loss, net of tax	1,382
Balance, as of March 31, 2015	$ (33,395)