Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Retained Earnings [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2019	$ (904,679)	$ 20	$ 4,318	$ 5,765,233	$ 4,864,892	$ 64,015	$ 4,928,907
Balance (in shares) at Dec. 31, 2019		20	431,815
Contributions from noncontrolling interests	0	$ 0	$ 0	0	0	109	109
Net income	837,993	0	0	0	837,993	514	838,507
Redeemable noncontrolling interests income	0	0	0	0	0	(605)	(605)
Dividends declared to common and preferred shares	(133,806)	0	0	0	(133,806)	0	(133,806)
Distributions to noncontrolling interests	0	0	0	0	0	(899)	(899)
Surrender of restricted common stock	0	$ 0	$ (3)	(5,322)	(5,325)	0	(5,325)
Surrender of restricted common stock (in shares)		0	(295)
Amortization of equity awards	0	$ 0	$ 0	11,124	11,124	0	11,124
Acquisition of noncontrolling interests	0	0	0	(19,348)	(19,348)	(1,271)	(20,619)
Exercise of common stock options	0	$ 0	$ 1	980	981	0	981
Exercise of common stock options (in shares)		0	63
Issuance of common stock	0	$ 0	$ 9	(9)	0	0	0
Issuance of common stock (in shares)		0	921
Balance at Jun. 30, 2020	(200,492)	$ 20	$ 4,325	5,752,658	5,556,511	61,863	5,618,374
Balance (in shares) at Jun. 30, 2020		20	432,504
Balance at Mar. 31, 2020	(942,031)	$ 20	$ 4,325	5,747,277	4,809,591	62,878	4,872,469
Balance (in shares) at Mar. 31, 2020		20	432,525
Contributions from noncontrolling interests	0	$ 0	$ 0	0	0	109	109
Net income	747,893	0	0	0	747,893	225	748,118
Redeemable noncontrolling interests income	0	0	0	0	0	(343)	(343)
Dividends declared to common and preferred shares	(6,354)	0	0	0	(6,354)	0	(6,354)
Distributions to noncontrolling interests	0	0	0	0	0	(344)	(344)
Surrender of restricted common stock	0	$ 0	$ 0	(166)	(166)	0	(166)
Surrender of restricted common stock (in shares)		0	(21)
Amortization of equity awards	0	$ 0	$ 0	5,395	5,395	0	5,395
Acquisition of noncontrolling interests	0	0	0	152	152	(662)	(510)
Balance at Jun. 30, 2020	(200,492)	$ 20	$ 4,325	5,752,658	5,556,511	61,863	5,618,374
Balance (in shares) at Jun. 30, 2020		20	432,504
Balance at Dec. 31, 2020	(162,812)	$ 20	$ 4,325	5,766,511	5,608,044	62,210	5,670,254
Balance (in shares) at Dec. 31, 2020		20	432,519
Net income	254,639	$ 0	$ 0	0	254,639	3,904	258,543
Redeemable noncontrolling interests income	0	0	0	0	0	(176)	(176)
Dividends declared to common and preferred shares	(160,092)	0	0	0	(160,092)	0	(160,092)
Distributions to noncontrolling interests	0	0	0	0	0	(992)	(992)
Surrender of restricted common stock	0	$ 0	$ (5)	(9,241)	(9,246)	0	(9,246)
Surrender of restricted common stock (in shares)		0	(548)
Amortization of equity awards	0	$ 0	$ 0	11,954	11,954	0	11,954
Exercise of common stock options	0	$ 0	$ 1	1,969	1,970	0	1,970
Exercise of common stock options (in shares)		0	104
Issuance of common stock	0	$ 0	$ 14	(14)	0	0	0
Issuance of common stock (in shares)		0	1,442
Balance at Jun. 30, 2021	(68,265)	$ 20	$ 4,335	5,771,179	5,707,269	64,946	5,772,215
Balance (in shares) at Jun. 30, 2021		20	433,517
Balance at Mar. 31, 2021	(104,909)	$ 20	$ 4,334	5,763,868	5,663,313	65,154	5,728,467
Balance (in shares) at Mar. 31, 2021		20	433,448
Net income	116,697	$ 0	$ 0	0	116,697	421	117,118
Redeemable noncontrolling interests income	0	0	0	0	0	(7)	(7)
Dividends declared to common and preferred shares	(80,053)	0	0	0	(80,053)	0	(80,053)
Distributions to noncontrolling interests	0	0	0	0	0	(622)	(622)
Surrender of restricted common stock	0	$ 0	$ 0	(154)	(154)	0	(154)
Surrender of restricted common stock (in shares)		0	(27)
Amortization of equity awards	0	$ 0	$ 0	5,656	5,656	0	5,656
Exercise of common stock options	0	$ 0	$ 1	1,809	1,810	0	1,810
Exercise of common stock options (in shares)		0	96
Balance at Jun. 30, 2021	$ (68,265)	$ 20	$ 4,335	$ 5,771,179	$ 5,707,269	$ 64,946	$ 5,772,215
Balance (in shares) at Jun. 30, 2021		20	433,517