Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2017 - 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, 2016	$ 3,014,349	$ 1	$ 2,191,756	$ 1,046,822	$ (230,400)	$ 3,008,179	$ 6,170
Balance shares at Dec. 31, 2016	109,944	109,944
Net income (loss) for nine months ended September 30, 2017	$ 201,150	$ 0	0	201,922	0	201,922	(772)
Dividends on common shares	(117,174)	0	0	(117,174)	0	(117,174)	0
Shares issued in connection with share-based compensation plans, value	1,195	$ 0	3,784	(2,589)	0	1,195	0
Shares issued in connection with share-based compensation plans, shares		873
Share-based compensation	31,196	$ 0	31,196	0	0	31,196	0
Net activity related to noncontrolling interests	(952)	0	(45)	0	0	(45)	(907)
Other comprehensive income (Note 12)	168,633	0	0	0	168,621	168,621	12
Balance value at Sep. 30, 2017	$ 3,298,397	$ 1	$ 2,226,691	$ 1,128,981	$ (61,779)	$ 3,293,894	$ 4,503
Balance shares at Sep. 30, 2017	110,817	110,817