Unaudited Condensed Consolidated Statement of Equity Statement (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Treasury Stock	Capital in Excess of Par Value	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2012	$ 1,362,827	$ 211,057	$ (10)	$ 1,307,058	$ (286,795)	$ 111,717	$ 19,800
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	110,779	0	0	0	118,015	(9,768)	2,532
Dividends declared on common stock	(42,371)	0	0	(42,371)	0	0	0
Employee share-based compensation earned	8,887	0	0	8,887	0	0	0
Stock option exercises	5,097	573	0	4,524	0	0	0
Restricted stock awards, net of forfeitures	0	(378)	(3)	(375)	0	0	0
Purchase of Company common stock	(1,851)	0	(117)	(717)	(1,017)	0	0
Cancellation of Company Stock	0	(8,000)	8,000	0	0	0	0
Tax Benefits Related to Share-Based Awards	6,083	0	0	6,083	0	0	0
Purchase of noncontrolling interest	(8,333)	0	0	1,696	0	0	6,637
Noncontrolling interest payment	(1,700)	0	0	0	0	0	(1,700)
Other	1,356	82	0	1,274	0	0	0
Balance at end of period at Sep. 30, 2013	1,440,774	212,082	(122)	1,282,667	(169,797)	101,949	13,995
Balance at beginning of period at Dec. 31, 2013	1,424,378	212,327	(10)	1,259,348	(145,876)	88,441	10,148
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Comprehensive income	80,239	0	0	0	84,675	(10,618)	6,182
Dividends declared on common stock	(53,026)	0	0	(53,026)	0	0	0
Employee share-based compensation earned	9,742	0	0	9,742	0	0	0
Stock option exercises	28,370	2,855	0	25,515	0	0	0
Restricted stock awards, net of forfeitures	0	(352)	0	(352)	0	0	0
Purchase of Company common stock	130,923	0	(6,386)	(37,653)	(86,884)	0	0
Cancellation of Company Stock	0	(42,000)	42,000	0	0	0	0
Tax Benefits Related to Share-Based Awards	20,727	0	0	20,727	0	0	0
Purchase of noncontrolling interest	(15,000)	0	0	7,440	0	0	7,560
Noncontrolling interest payment	(135)	0	0	0	0	0	(135)
Other	1,564	93	0	1,471	0	0	0
Balance at end of period at Sep. 30, 2014	$ 1,365,936	$ 215,585	$ (6,354)	$ 1,218,332	$ (148,085)	$ 77,823	$ 8,635