CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 10,693	$ 11,511
Other comprehensive income, before tax:
Foreign currency translation adjustments	(5,228)	(10,622)
Amortization of pension liability adjustment:
Transition obligation		17
Prior service (credit)/cost	(1,109)	(908)
Net actuarial loss	1,328	1,664
Payments related to derivatives included in earnings	478	456
Derivative valuation adjustment	(360)	1
Income taxes related to items of other comprehensive income:
Amortization of pension liability adjustment	(88)	(270)
Payments related to derivatives included in earnings	(186)	(178)
Derivative valuation adjustment	140
Comprehensive Income	5,668	1,671
Comprehensive income attributable to the noncontrolling interest
Comprehensive income attributable to the Company	$ 5,668	$ 1,671