Consolidated Statement of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Capital in Excess of Par Value	Accumulated Deficit(1)	Accumulated Other Comprehensive Income	Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2013	$ 1,480,228	$ 212,327	$ (10)	$ 1,259,348	$ (90,026)	$ 88,441	$ 10,148
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	149,824	0	0	0	172,469	(29,027)	6,382
Dividends declared on common stock	(71,517)	0	0	(71,517)	0	0	0
Stock option exercises	33,137	3,642	0	29,495	0	0	0
Restricted stock awards, net of forfeitures	0	352	0	(352)	0	0	0
Employee share-based compensation earned	13,127		0
Purchase of Company common stock	(243,635)	0		13,127	0	0	0
Tax benefits related to stock-based awards	30,123	0	0	30,123	0	0	0
Purchase of noncontrolling interest	(15,000)	0	(11,537)	(67,796)	(164,302)	0	0
Acquisition		0	0	(7,441)	0	0	(7,559)
Noncontrolling interest payments	$ (319)	$ 0	$ 0	$ 0	$ 0	$ 0	$ (319)
Retirement of treasury shares	0	(10,956)	(10,956)	0	0	0	0
Other	$ 1,410	$ 93	$ 0	$ 1,317	$ 0	$ 0	$ 0
Balance at end of period at Dec. 31, 2014	1,377,378	205,458	(591)	1,186,304	(81,859)	59,414	8,652
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	181,651	0	0	0	233,772	(53,250)	1,129
Dividends declared on common stock	(87,570)	0	0	(87,570)	0	0	0
Stock option exercises	31,931	3,054	0	28,877	0	0	0
Restricted stock awards, net of forfeitures	0	254	(9)	(245)	0	0	0
Employee share-based compensation earned	13,843	0	0	13,843	0	0	0
Purchase of Company common stock	(345,383)	0	(12,455)	(71,664)	(261,264)	0	0
Tax benefits related to stock-based awards	18,123	0	0	18,123	0	0	0
Purchase of noncontrolling interest	(2,075)	0	0	2,775	0	0	(4,850)
Noncontrolling interest payments	$ (222)	$ 0	$ 0	$ 0	$ 0	$ 0	$ (222)
Retirement of treasury shares	0	(7,969)	(7,969)	0	0	0	0
Other	$ 1,725	$ 62	$ 0	$ 1,663	$ 0	$ 0	$ 0
Balance at end of period at Dec. 31, 2015	1,189,401	200,859	(5,086)	1,092,106	(109,351)	6,164	4,709
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	187,636	0	0	0	177,038	10,328	270
Dividends declared on common stock	(98,418)	0	0	(98,418)	0	0	0
Stock option exercises	17,662	2,108	0	15,554	0	0	0
Restricted stock awards, net of forfeitures	0	241	(1)	(240)	0	0	0
Employee share-based compensation earned	14,056	0	0	14,056	0	0	0
Purchase of Company common stock	(227,928)	0	(8,812)	(48,042)	(171,074)	0	0
Tax benefits related to stock-based awards	12,685	0	0	12,685	0	0	0
Purchase of noncontrolling interest	(1,961)			(364)			(2,325)
Noncontrolling interest payments	$ (120)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 120
Retirement of treasury shares	0	(7,901)	(7,901)	0	0	0	0
Other	$ 2,234	$ 96	$ 0	$ 2,138	$ 0	$ 0	$ 0
Balance at end of period at Dec. 31, 2016	$ 1,095,247	$ 195,403	$ (5,998)	$ 990,203	$ (103,387)	$ 16,492	$ 2,534