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Consolidated Statements Of Shareholders' Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Shareholders' Equity [Abstract]
Foreign currency translation adjustment, tax (benefit)	$ (2,002)	$ (1,443)	$ 1,563
Derivative financial instruments adjustment, tax (benefit)	(423)	(287)	4,538
Net gains or losses and prior service costs, tax (benefit)	(20,032)	(2,135)	2,310
Amortization of prior service costs and net gains or losses, tax	2,232	1,732	398
Cash dividends declared, per share	$ 0.18	$ 0.16	$ 0.16
Issued upon exercise of stock options, income tax (benefit)	$ (76)	$ 204	$ (64)

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Tax effect on the accumulated change in the value of either the projected benefit obligation or plan assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost.

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