Accumulated Other Comprehensive Income (Loss) (Component of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended		3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Cumulative Currency Translation Adjustment [Member]		Mar. 31, 2011 Cumulative Currency Translation Adjustment [Member]		Jun. 30, 2010 Cumulative Currency Translation Adjustment [Member]		Mar. 31, 2010 Cumulative Currency Translation Adjustment [Member]		Jun. 30, 2011 Foreign Currency Gains (Losses) [Member]	Mar. 31, 2011 Foreign Currency Gains (Losses) [Member]	Jun. 30, 2010 Foreign Currency Gains (Losses) [Member]	Mar. 31, 2010 Foreign Currency Gains (Losses) [Member]	Jun. 30, 2011 Unrealized Gains (Losses) on Cash Flow Hedges [Member]	Mar. 31, 2011 Unrealized Gains (Losses) on Cash Flow Hedges [Member]	Jun. 30, 2010 Unrealized Gains (Losses) on Cash Flow Hedges [Member]	Mar. 31, 2010 Unrealized Gains (Losses) on Cash Flow Hedges [Member]	Jun. 30, 2011 Pension and Postretirement Benefit Plans [Member]	Mar. 31, 2011 Pension and Postretirement Benefit Plans [Member]	Jun. 30, 2010 Pension and Postretirement Benefit Plans [Member]	Mar. 31, 2010 Pension and Postretirement Benefit Plans [Member]	Jun. 30, 2011 Accumulated Other Comprehensive Income [Member]	Mar. 31, 2011 Accumulated Other Comprehensive Income [Member]	Jun. 30, 2010 Accumulated Other Comprehensive Income [Member]	Mar. 31, 2010 Accumulated Other Comprehensive Income [Member]
Balance at beginning of period			$ 61,425		$ 100,527	[1]	$ 69,282	[1]	$ 95,753	[1]	$ 134,573	[1]	$ 22,185	$ 19,095	$ (12,102)	$ (21,319)	$ (683)	$ (933)	$ (688)	$ (250)	$ (26,759)	$ (26,019)	$ (30,287)	$ (30,490)	$ 95,270	$ 61,425	$ 52,676	$ 82,514
Before tax (loss) income					17,711	[1]	31,245	[1]	(47,788)	[1]	(38,820)	[1]	(2,403)	3,524	664	8,920	(23)	404	(495)	(706)	136	(669)	260	287	15,421	34,504	(47,359)	(30,319)
Income tax effect										[1]		[1]	99	(434)	(649)	297	9	(154)	188	268	(34)	(71)	(75)	(84)	74	(659)	(536)	481
Other comprehensive income (loss)	15,495	(47,895)	49,340	(77,733)	17,711	[1]	31,245	[1]	(47,788)	[1]	(38,820)	[1]	(2,304)	3,090	15	9,217	(14)	250	(307)	(438)	102	(740)	185	203	15,495	33,845	(47,895)	(29,838)
Balance at ending of period	$ 110,765		$ 110,765		$ 118,238	[1]	$ 100,527	[1]	$ 47,965	[1]	$ 95,753	[1]	$ 19,881	$ 22,185	$ (12,087)	$ (12,102)	$ (697)	$ (683)	$ (995)	$ (688)	$ (26,657)	$ (26,759)	$ (30,102)	$ (30,287)	$ 110,765	$ 95,270	$ 4,781	$ 52,676

[1] Income taxes are generally not provided for foreign currency translation adjustments, as such adjustments relate to permanent investments in international subsidiaries.