CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 69,018	$ 279,115	$ 158,365
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	181,549	191,379	113,882
Non-cash rental and related revenues	(19,449)	(36,443)	(30,352)
Non-cash interest income	(2,212)	(2,300)	(769)
Non-cash interest expense	10,080	10,137	7,776
Stock-based compensation expense	9,819	7,648	8,359
Non-cash lease termination income	(10,579)	0	0
Loss on extinguishment of debt	16,340	2,917	553
Provision for doubtful accounts, straight-line rental income and loan losses	1,238	39,075	17,113
Change in fair value of contingent consideration	0	0	(426)
Net gain on sales of real estate	(2,300)	(128,198)	(52,029)
Impairment of real estate	121,819	1,413	1,326
Loss from unconsolidated joint venture	6,796	5,431	0
Distributions of earnings from unconsolidated joint venture	13,865	8,910	0
Changes in operating assets and liabilities:
Accounts receivable, prepaid expenses and other assets, net	(9,639)	(6,753)	(16,811)
Accounts payable and accrued liabilities	(13,870)	(11,745)	(71,198)
Net cash provided by operating activities	372,475	360,586	135,789
Cash flows from investing activities:
Acquisition of real estate	(51,136)	(261,511)	(419,905)
Cash received in CCP Merger	0	0	77,859
Origination and fundings of loans receivable	(13,065)	(50,731)	(17,239)
Origination and fundings of preferred equity investments	0	(5,313)	(2,749)
Additions to real estate	(25,451)	(27,697)	(6,954)
Repayments of loans receivable	18,367	51,789	32,430
Repayments of preferred equity investments	5,079	6,870	3,755
Investment in unconsolidated joint venture	0	(354,461)	0
Net proceeds from sales of real estate	329,050	382,560	150,243
Net cash provided by (used in) investing activities	262,844	(258,494)	(182,560)
Cash flows from financing activities:
Net (repayments of) proceeds from revolving credit facility	(624,000)	(17,000)	253,000
Proceeds from issuance of senior unsecured notes	638,779	0	0
Principal payments on senior unsecured notes	(700,000)	0	0
Proceeds from term loans	0	0	181,000
Principal payments on term loans	(145,000)	0	0
Principal payments on secured debt	(3,436)	(140,338)	(4,145)
Payments of deferred financing costs	(15,598)	(352)	(15,337)
Payments related to extinguishment of debt	(10,502)	(2,043)	0
Payment of contingent consideration	0	0	(382)
Distributions to noncontrolling interests	(316)	(142)	(30)
Preferred stock redemption	0	(143,750)	0
Issuance of common stock, net	549,328	(499)	366,800
Dividends paid on common and preferred stock	(335,435)	(325,220)	(182,089)
Net cash (used in) provided by financing activities	(646,180)	(629,344)	598,817
Net (decrease) increase in cash, cash equivalents and restricted cash	(10,861)	(527,252)	552,046
Effect of foreign currency translation on cash, cash equivalents and restricted cash	346	(539)	738
Cash, cash equivalents and restricted cash, beginning of period	59,658	587,449	34,665
Cash, cash equivalents and restricted cash, end of period	49,143	59,658	587,449
Supplemental disclosure of cash flow information:
Interest paid	123,854	137,668	69,686
Income taxes paid	3,911	1,800	714
Supplemental disclosure of non-cash investing and financing activities:
Acquisition of business in CCP Merger	0	0	3,726,092
Assumption of indebtedness in CCP Merger	0	0	(1,751,373)
Stock exchanged in CCP Merger	0	0	(2,052,578)
Real estate acquired through loan receivable foreclosure	0	0	19,096
Decrease in loans receivable and other investments due to acquisition of real estate	$ 0	$ 0	$ (6,913)