ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated other comprehensive income activity
Balance at the beginning of the period	$ 123,766
Balance at the end of the period	60,318	123,766
Change in derivatives	3
Changes in treasury locks, net of tax	56	84	80
Foreign Currency Translation Adjustments
Accumulated other comprehensive income activity
Balance at the beginning of the period	148,027	204,720	159,791
Period change	(47,436)	(56,693)	44,929
Balance at the end of the period	100,591	148,027	204,720
Unrecognized Pension Gains/(Losses)
Accumulated other comprehensive income activity
Balance at the beginning of the period	(23,836)	(18,112)	(19,902)
Period change	(16,071)	(5,724)	1,790
Balance at the end of the period	(39,907)	(23,836)	(18,112)
Effects of deferred income tax assets	9,481	3,062	(853)
Other Adjustments
Accumulated other comprehensive income activity
Balance at the beginning of the period	(425)	(509)	(589)
Period change	59	84	80
Balance at the end of the period	(366)	(425)	(509)
Change in derivatives	3
Changes in treasury locks, net of tax	56	84	80
Effects of deferred income tax assets	32
Accumulated Other Comprehensive Income/(Loss)
Accumulated other comprehensive income activity
Balance at the beginning of the period	123,766	186,099	139,300
Period change	(63,448)	(62,333)	46,799
Balance at the end of the period	60,318	123,766	186,099
Change in derivatives	3
Changes in treasury locks, net of tax	$ 56	$ 84	$ 80