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Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 14,648	$ 15,629
Foreign currency translation adjustments	728	(11,957)
Net change in:
Deferred gains (losses) on cash flow hedges, net of taxes of $27 and $(170), respectively	(79)	441
Unrecognized retirement obligations, net of taxes of $(1,415) and $(2,313), respectively	2,316	3,827
Other comprehensive income (loss)	2,965	(7,689)
Comprehensive income	$ 17,613	$ 7,940

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Other comprehensive income (loss), amortization, pension and other postretirement benefit plans, net prior service cost unrecognized in net periodic pension cost, net of tax.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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