Consolidated Statement of Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Treasury Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Balance at beginning of period at Dec. 31, 2009	$ 1,482,788	$ 254,027	$ (10)	$ 1,735,493	$ (603,876)	$ 97,142	$ 12
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income	127,001
Foreign currency translation	15,635					15,626
Total comprehensive income	142,636				126,417	15,626	593
Tax benefits related to share based awards	(229)			(229)
Dividends declared on common stock	(39,442)			(39,442)
Stock option exercises	1,759	431		1,328
Restricted stock awards, net of forfeitures	0	532		(532)
Employee share-based compensation earned	8,878			8,878
Issuance of shares from treasury stock	(116,878)		(14,008)	(102,870)
Payments to Acquire Additional Interest in Subsidiaries	0
Noncontrolling interest payment
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	113						(113)
Retirement of treasury shares	0	12,973	12,973
Other	549	3	60	486
Balance at end of period at Dec. 31, 2010	1,479,948	242,020	(985)	1,603,112	(477,459)	112,768	492
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income	146,232
Foreign currency translation	(6,925)					(6,916)
Total comprehensive income	139,307				144,903	(6,916)	1,320
Dividends declared on common stock	(46,171)			(46,171)
Stock option exercises	8,227	1,208		7,019
Restricted stock awards, net of forfeitures	0	539		(539)
Employee share-based compensation earned	9,144			9,144
Purchase of Company common stock	(197,302)		(19,899)	(142,915)	34,488
Acquisition	18,857						18,857
Payments to Acquire Additional Interest in Subsidiaries	0
Noncontrolling interest payment
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	568						568
Retirement of treasury shares	0	19,174	(19,174)
Other	753	73		680
Balance at end of period at Dec. 31, 2011	1,412,195	224,666	(1,710)	1,430,330	(367,044)	105,852	20,101
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income	154,135
Foreign currency translation	5,892					5,865
Total comprehensive income	160,027				152,546	5,865	1,616
Dividends declared on common stock	(49,253)			(49,253)
Stock option exercises	18,389	2,993		15,396
Restricted stock awards, net of forfeitures	0	483		(483)
Employee share-based compensation earned	10,983			10,983
Purchase of Company common stock	(186,766)		(15,467)	(99,002)	72,297
Payments to Acquire Additional Interest in Subsidiaries	(3,000)			1,762			1,238
Noncontrolling interest payment
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	679						679
Retirement of treasury shares	0	17,167	(17,167)
Other	931	82		849
Balance at end of period at Dec. 31, 2012	$ 1,362,827	$ 211,057	$ (10)	$ 1,307,058	$ (286,795)	$ 111,717	$ 19,800