Consolidated Statement of Changes in Stockholders' Equity and Noncontrolling Interests (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Noncontrolling Interests	Redeemable Noncontrolling Interests
Beginning balance (shares) at Dec. 31, 2019			120,800,315
Beginning balance at Dec. 31, 2019	$ 10,154,178	$ (2,484)	$ 1,208	$ 8,874,367	$ 0	$ (2,484)	$ (9,749)	$ 1,288,352
Increase (Decrease) in Stockholders' Equity
Net income	369,355				329,475			39,880
Total other comprehensive income (loss)	(889)						(889)
Contributions from and sales of noncontrolling interests	414,025			56,026				357,999
Distributions to and redemption of noncontrolling interests	(64,157)							(64,157)
Issuances of common stock (in shares)			12,051,916
Issuance of common stock	1,813,573		$ 120	1,813,453
Issuances pursuant to stock plan (in shares)			573,361
Issuance pursuant to stock plan	64,330		$ 6	64,324
Taxes paid related to net settlement of equity awards (in shares)			(113,806)
Taxes related to net settlement of equity awards	(17,341)		$ (1)	(17,340)
Dividends declared on common stock	(406,702)				(406,702)
Reclassification of distributions in excess of earnings	0			(79,711)	79,711
Ending balance (shares) at Sep. 30, 2020			133,311,786
Ending balance at Sep. 30, 2020	12,323,888		$ 1,333	10,711,119	0		(10,638)	1,622,074
Beginning balance at Dec. 31, 2019									$ 12,300
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income									683
Contributions from and sales of noncontrolling interests									187
Distributions to noncontrolling interests									(1,938)
Ending balance at Sep. 30, 2020									11,232
Beginning balance (shares) at Jun. 30, 2020			124,558,619
Beginning balance at Jun. 30, 2020	11,056,854		$ 1,246	9,443,274	0		(13,080)	1,625,414
Increase (Decrease) in Stockholders' Equity
Net income	95,551				81,056			14,495
Total other comprehensive income (loss)	2,442						2,442
Contributions from and sales of noncontrolling interests	8,561			15				8,546
Distributions to and redemption of noncontrolling interests	(26,381)							(26,381)
Issuances of common stock (in shares)			8,659,294
Issuance of common stock	1,309,235		$ 86	1,309,149
Issuances pursuant to stock plan (in shares)			102,072
Issuance pursuant to stock plan	21,988		$ 1	21,987
Taxes paid related to net settlement of equity awards (in shares)			(8,199)
Taxes related to net settlement of equity awards	(1,322)		$ 0	(1,322)
Dividends declared on common stock	(143,040)				(143,040)
Reclassification of distributions in excess of earnings	0			(61,984)	61,984
Ending balance (shares) at Sep. 30, 2020			133,311,786
Ending balance at Sep. 30, 2020	12,323,888		$ 1,333	10,711,119	0		(10,638)	1,622,074
Beginning balance at Jun. 30, 2020									12,122
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income									248
Contributions from and sales of noncontrolling interests									94
Distributions to noncontrolling interests									(1,232)
Ending balance at Sep. 30, 2020									11,232
Beginning balance (shares) at Dec. 31, 2020			136,690,329
Beginning balance at Dec. 31, 2020	13,432,436		$ 1,367	11,730,970	0		(6,625)	1,706,724
Increase (Decrease) in Stockholders' Equity
Net income	553,827				496,352			57,475
Total other comprehensive income (loss)	596						596
Contributions from and sales of noncontrolling interests	753,971			199,644				554,327
Distributions to and redemption of noncontrolling interests	(81,324)							(81,324)
Issuances of common stock (in shares)			16,215,052
Issuance of common stock	2,758,545		$ 162	2,758,383
Issuances pursuant to stock plan (in shares)			518,090
Issuance pursuant to stock plan	72,287		$ 5	72,282
Taxes paid related to net settlement of equity awards (in shares)			(139,961)
Taxes related to net settlement of equity awards	(24,912)		$ (2)	(24,910)
Dividends declared on common stock	(504,986)				(504,986)
Reclassification of distributions in excess of earnings	0			(8,634)	8,634
Ending balance (shares) at Sep. 30, 2021			153,283,510
Ending balance at Sep. 30, 2021	16,960,440		$ 1,532	14,727,735	0		(6,029)	2,237,202
Beginning balance at Dec. 31, 2020	11,342								11,342
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income									659
Contributions from and sales of noncontrolling interests									282
Distributions to noncontrolling interests									(602)
Ending balance at Sep. 30, 2021	11,681								11,681
Beginning balance (shares) at Jun. 30, 2021			150,707,878
Beginning balance at Jun. 30, 2021	16,170,250		$ 1,507	14,194,023	0		(4,508)	1,979,228
Increase (Decrease) in Stockholders' Equity
Net income	124,211				103,147			21,064
Total other comprehensive income (loss)	(1,521)						(1,521)
Contributions from and sales of noncontrolling interests	360,551			95,729				264,822
Distributions to and redemption of noncontrolling interests	(27,912)							(27,912)
Issuances of common stock (in shares)			2,452,349
Issuance of common stock	492,081		$ 24	492,057
Issuances pursuant to stock plan (in shares)			147,162
Issuance pursuant to stock plan	21,040		$ 1	21,039
Taxes paid related to net settlement of equity awards (in shares)			(23,879)
Taxes related to net settlement of equity awards	(4,699)		$ 0	(4,699)
Dividends declared on common stock	(173,561)				(173,561)
Reclassification of distributions in excess of earnings	0			(70,414)	70,414
Ending balance (shares) at Sep. 30, 2021			153,283,510
Ending balance at Sep. 30, 2021	16,960,440		$ 1,532	$ 14,727,735	$ 0		$ (6,029)	$ 2,237,202
Beginning balance at Jun. 30, 2021									11,567
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income									222
Contributions from and sales of noncontrolling interests									94
Distributions to noncontrolling interests									(202)
Ending balance at Sep. 30, 2021	$ 11,681								$ 11,681