CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 210,597	$ 187,662
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation	7,403	11,279
Net amortization of debt discounts, premiums and deferred financing fees	165	801
Straight line rental income	(837)	(1,528)
Amortization of acquired real estate leases	53	997
Other amortization	1,034	1,628
Share-based compensation	3,927	5,338
Loss on asset impairment	0	12,087
Loss on marketable securities	0	4,987
Loss on early extinguishment of debt	0	4,867
Net gain on sale of properties	(193,037)	(205,211)
Change in assets and liabilities:
Rents receivable and other assets	(8,116)	(11,410)
Accounts payable, accrued expenses and other	(6,548)	(10,082)
Rent collected in advance	(1,871)	(1,786)
Cash provided by (used in) operating activities	12,770	(371)
CASH FLOWS FROM INVESTING ACTIVITIES:
Real estate improvements	(14,340)	(12,761)
Insurance proceeds received	0	1,443
Proceeds from sale of properties, net	427,379	744,324
Proceeds from maturity of marketable securities	250,000	0
Proceeds from sale of marketable securities	0	18,613
Cash provided by investing activities	663,039	751,619
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase and retirement of common shares	(5,342)	(89,910)
Payments on borrowings	(143)	(175,265)
Distributions to common shareholders	(1,160)	0
Distributions to preferred shareholders	(1,997)	(1,997)
Cash used in financing activities	(8,642)	(267,172)
Increase in cash, cash equivalents, and restricted cash	667,167	484,076
Cash, cash equivalents, and restricted cash at beginning of period	2,404,101	2,360,590
Cash, cash equivalents, and restricted cash at end of period	3,071,268	2,844,666
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	7,714	14,631
Taxes (refunded), net	(2)	(2)
NON-CASH INVESTING ACTIVITIES:
(Decrease) increase in accrued capital expenditures	(10,633)	103
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$ 2,404,101	$ 2,360,590

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Difference between actual rental income due and rental income recognized on a straight-line basis.

+ References

+ Details

Name:	us-gaap_StraightLineRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration