Shareholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Currency Translation Adjustment, Net of Tax	$ 40,371	$ 59,102	$ 27,455
Net unrealized (loss) gain on cash flow hedging arrangements, net of tax	(5,719)	(3,602)	2,808
Actuarial losses (gains)	(176,005)	(72,510)	(73,234)
Deferred Taxes on pension and post-retirement benefit related items	54,415	25,211	26,762
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (86,938)	$ 8,201	$ (16,209)