Consolidated Statements of Equity - 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
Net income (loss)	421,863	$ 0	0	423,049	0	423,049	(1,186)
Dividends on common shares	(159,284)	0	0	(159,284)	0	(159,284)	0
Shares issued in connection with share-based compensation, value	2,732	$ 0	6,226	(3,494)	0	2,732	0
Shares issued in connection with share-based compensation, shares		981
Share-based compensation	37,399	$ 0	37,399	0	0	37,399	0
Net activity related to noncontrolling interests	(957)	0	970	0	0	970	(1,927)
Other	4,019	0	0	4,019	0	4,019	0
Other comprehensive income (loss)	162,904	0	0	0	162,891	162,891	13
Balance, Value at Dec. 31, 2017	3,483,025	$ 1	2,236,351	1,311,112	(67,509)	3,479,955	3,070
Balance, Shares at Dec. 31, 2017		110,925
Cumulative effect adjustment	(40,550)				(40,550)
Cumulative effect adjustment | Accounting Standards Update 2016-01	0	$ 0	0	40,550	(40,550)	0	0
Net income (loss)	475,898	0	0	474,496	0	474,496	1,402
Dividends on common shares	(178,487)	0	0	(178,487)	0	(178,487)	0
Purchase of Company shares	(18,801)	$ 0	(18,801)	0	0	(18,801)	0
Purchase of Company shares, shares		(425)
Shares issued in connection with share-based compensation, value	(4,105)	$ 0	(599)	(3,506)	0	(4,105)	0
Shares issued in connection with share-based compensation, shares		996
Share-based compensation	41,145	$ 0	41,145	0	0	41,145	0
Net activity related to noncontrolling interests	(753)	0	194	0	0	194	(947)
Other comprehensive income (loss)	(52,534)	0	0	0	(52,516)	(52,516)	(18)
Balance, Value at Dec. 31, 2018	$ 3,745,388	$ 1	2,258,290	1,644,165	(160,575)	3,741,881	3,507
Balance, Shares at Dec. 31, 2018	111,496	111,496
Cumulative effect adjustment | Accounting Standards Update 2016-02	$ 1,283	$ 0	0	1,283	0	1,283	0
Net income (loss)	709,848	0	0	707,410	0	707,410	2,438
Dividends on common shares	(188,440)	0	0	(188,440)	0	(188,440)	0
Purchase of Company shares	(2,066)	$ 0	(2,066)	0	0	(2,066)	0
Purchase of Company shares, shares		(47)
Shares issued in connection with share-based compensation, value	(1,187)	$ 0	2,182	(3,369)	0	(1,187)	0
Shares issued in connection with share-based compensation, shares		1,027
Share-based compensation	42,474	$ 0	42,474	0	0	42,474	0
Net activity related to noncontrolling interests	(1,380)	0	46	0	0	46	(1,426)
Other comprehensive income (loss)	119,082	0	0	0	119,083	119,083	(1)
Balance, Value at Dec. 31, 2019	$ 4,425,002	$ 1	$ 2,300,926	$ 2,161,049	$ (41,492)	$ 4,420,484	$ 4,518
Balance, Shares at Dec. 31, 2019	112,476	112,476