Condensed Consolidated Statements Of Shareholders' Equity (USD $) In Thousands	Common Stock and Additional Paid-In Capital [Member]	Retained Earnings [Member]	Cumulative Translation Adjustment [Member]	Retirement Benefits Adjustments [Member]	Cumulative Unrealized Loss on Derivatives [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2010	$ 442,117	$ 1,005,040	$ 38,302	$ (30,088)	$ (20,923)	$ (58,788)	$ 1,375,660
Net income		98,133					98,133
Other comprehensive income, net of tax:
Cumulative translation adjustment			31,537				31,537
Amortization of retirement obligations				1,577			1,577
Net change on derivatives designated as cash flow hedges					1,764		1,764
Other comprehensive income							34,878
Comprehensive income							133,011
Issuance of 1,108,287 shares of common stock from issuance of unvested shares, exercise of stock options and deferred compensation plans, net of tax benefit	27,114						27,114
Unvested shares surrendered for tax withholding						(5,768)	(5,768)
Share-based compensation	9,800						9,800
Cash dividends declared - $.34 per common share		(28,167)					(28,167)
Balance at Jun. 30, 2011	$ 479,031	$ 1,075,006	$ 69,839	$ (28,511)	$ (19,159)	$ (64,556)	$ 1,511,650