Summary of Significant Accounting Policies - Adjustment to Additional Paid-In Capital and Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jul. 01, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jul. 01, 2020	Jun. 30, 2020	Dec. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts payable, accrued liabilities, and other liabilities	$ 729,939			$ 760,617
Total liabilities	7,405,114			8,572,743
Redeemable noncontrolling interests	119,591			57,396
Additional paid-in capital	10,122,112			10,175,235
Total stockholders’ equity	6,670,360			6,733,723
Total equity	7,218,797		$ 7,351,410	7,289,950	$ 7,362,191		$ 7,637,256	$ 6,658,859
Total liabilities and equity	$ 14,743,502			15,920,089
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts payable, accrued liabilities, and other liabilities				763,391
Total liabilities				8,575,517
Redeemable noncontrolling interests				0
Additional paid-in capital				10,229,857
Total stockholders’ equity				6,788,345
Total equity				7,344,572
Total liabilities and equity				15,920,089
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts payable, accrued liabilities, and other liabilities		$ (3,048)		(2,774)	(2,733)	$ (2,589)		(2,491)
Total liabilities				(2,774)
Redeemable noncontrolling interests		85,367		57,396	46,850	34,054		11,106
Additional paid-in capital				(54,622)
Total stockholders’ equity				(54,622)
Total equity		$ (82,319)		(54,622)	$ (44,117)	$ (31,465)		$ (8,615)
Total liabilities and equity				$ 0