ACCUMULATED OTHER COMPREHENSIVE LOSS AND OTHER COMPREHENSIVE INCOME (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Accumulated Other Comprehensive loss
Balance at the beginning of the period	$ (18,151)
Net current period change	2,107
Reclassification adjustment for losses included in net income	839
Balance at the end of the period	(15,205)
Pre-Tax Amount
Unrealized loss on derivatives	(1,360)	(134)
Change in pension liability adjustment	483	1,577
Change in foreign currency translation adjustment	5,576	6,491
Other comprehensive income	4,699	7,934
Tax Expense (benefit)
Unrealized loss on derivatives	(507)	(50)
Change in pension liability adjustment	180	588
Change in foreign currency adjustment	2,080	2,421
Other comprehensive income, tax expense (benefit)	1,753	2,959
After-Tax Amount
Unrealized gain (loss) on derivatives	(853)	(84)
Change in pension liability adjustment	303	989
Change in foreign currency translation adjustment	3,496	4,070
Other comprehensive (loss) income	2,946	4,975
Derivative Cash Flow Hedges
Accumulated Other Comprehensive loss
Balance at the beginning of the period	(453)
Net current period change	(1,270)
Reclassification adjustment for losses included in net income	417
Balance at the end of the period	(1,306)
Accrued Pension Benefit Liability
Accumulated Other Comprehensive loss
Balance at the beginning of the period	(40,291)
Net current period change	(119)
Reclassification adjustment for losses included in net income	422
Balance at the end of the period	(39,988)
Foreign Currency Items
Accumulated Other Comprehensive loss
Balance at the beginning of the period	22,593
Net current period change	3,496
Balance at the end of the period	$ 26,089