CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock and Additional Paid-In Capital	Retained Earnings	Cumulative Translation Adjustment	Retirement Benefits Adjustment	Cumulative Unrealized Gain (Loss) on Derivatives	Treasury Stock
Balance at Dec. 31, 2013	$ 1,572,989	$ 608,658	$ 1,293,740	$ 52,211	$ (23,857)	$ (31,659)	$ (326,104)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	146,325		146,325
Cumulative translation adjustment	14,158			14,158
Pension and other postretirement adjustments (net of tax of $521)	956				956
Amortization of forward starting swaps (net of tax of $1,325)	2,312					2,312
Issuance of 355,224 shares of common stock from issuance of unvested shares, exercise of stock options and deferred compensation plans (net of tax of $2,269)	12,523	12,523
Repurchase of 1,153,384 shares of common stock	(85,705)						(85,705)
Shares surrendered for tax withholding	(2,836)						(2,836)
Share-based compensation	9,199	9,199
Cash dividends declared - $.56 per common share	(45,034)		(45,034)
Balance at Jun. 30, 2014	$ 1,624,887	$ 630,380	$ 1,395,031	$ 66,369	$ (22,901)	$ (29,347)	$ (414,645)