CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Changes in AOCI by component
Beginning balance, net of tax	$ (38,801)	$ (1,419)
Other comprehensive (loss) income before reclassifications	1,672	(1,209)
Less income reclassified from AOCI	(546)	(171)
Net other comprehensive (loss) income	2,218	(1,038)
Income taxes	(1,164)	193
Ending balance, net of tax	(37,747)	(2,264)
Foreign currency translation adjustments
Changes in AOCI by component
Beginning balance, net of tax	25,913	38,663
Other comprehensive (loss) income before reclassifications	1,179	(989)
Less income reclassified from AOCI	(153)	(130)
Net other comprehensive (loss) income	1,332	(859)
Income taxes	1,155	(153)
Ending balance, net of tax	26,090	37,957
Retirement plans related adjustments
Changes in AOCI by component
Beginning balance, net of tax	(64,570)	(40,213)
Other comprehensive (loss) income before reclassifications	0	0
Net other comprehensive (loss) income	511	118
Income taxes	(45)	(21)
Ending balance, net of tax	(64,014)	(40,074)
Unrealized gain (loss) on cash flow hedges
Changes in AOCI by component
Beginning balance, net of tax	(144)	131
Other comprehensive (loss) income before reclassifications	493	(220)
Less income reclassified from AOCI	118	77
Net other comprehensive (loss) income	375	(297)
Income taxes	54	(19)
Ending balance, net of tax	$ 177	$ (147)