Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total stockholders' equity	Noncontrolling Interests
Balance value at Dec. 31, 2014	$ 2,576,044	$ 1	$ 2,109,712	$ 662,310	$ (199,106)	$ 2,572,917	$ 3,127
Balance shares at Dec. 31, 2014	107,541	107,541
Net income for nine months ended September 30, 2015	$ 207,135			206,520		206,520	615
Dividends on common shares	(81,283)			(81,283)		(81,283)
Shares issued in connection with share-based compensation plans, value	6,962		8,650	(1,688)		6,962
Shares issued in connection with share-based compensation plans, shares		1,203
Share-based compensation	20,261		20,261			20,261
Net activity related to noncontrolling interests	(705)						(705)
Other comprehensive loss (Note 12)	(35,324)				(35,307)	(35,307)	(17)
Balance value at Sep. 30, 2015	$ 2,693,090	$ 1	$ 2,138,623	$ 785,859	$ (234,413)	$ 2,690,070	$ 3,020
Balance shares at Sep. 30, 2015	108,744	108,744