Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Flows — Operating Activities
Net Income	$ 136,169	$ 229,208	$ 124,120
Adjustments to net income:
Depreciation and amortization, including intangible assets and deferred financing costs	121,749	129,712	112,722
Non-cash asset management fee expense and directors’ compensation	29,463	14,953	14,696
Realized and unrealized (gain) loss on foreign currency transactions and other	(18,040)	8,746	7,696
Straight-line rent	(14,386)	(14,900)	(17,062)
Equity in losses of equity method investments in real estate in excess of distributions received	14,201	11,745	2,501
Loss (gain) on change in control of interests	13,851	(49,922)	0
Impairment charges	8,959	29,706	1,023
Write-off of real estate, provision for doubtful accounts, and other non-cash adjustments	(7,159)	(1,453)	2,646
Amortization of rent-related intangibles and deferred rental revenue	(6,153)	(19,637)	(6,076)
Deferred income tax (benefit) expense	(4,500)	4,683	4,150
Accretion of commercial mortgage-backed securities and other	(3,171)	(1,827)	(3,760)
Gain on sale of real estate	(2,879)	(132,858)	(2,197)
Loss on extinguishment of debt	1,587	1,136	58
Settlement of derivative asset	(26)	0	2,948
Net changes in other operating assets and liabilities	(12,631)	2,077	419
Net Cash Provided by Operating Activities	257,034	211,369	243,884
Cash Flows — Investing Activities
Capital contributions to equity investments in real estate	(153,460)	(11,048)	(39,015)
Proceeds from sale of real estate	111,229	258,293	0
Return of capital from equity investments in real estate	39,974	42,744	34,962
Proceeds from repayment of preferred equity interest	27,000	0	0
Funding for build-to-suit projects	(12,021)	(13,312)	(24,258)
Acquisitions of real estate and direct financing leases	(10,822)	(203,093)	(293,324)
Value added taxes refunded in connection with acquisition of real estate	7,334	23,769	15,194
Other investing activities, net	4,689	2,407	0
Payment of deferred acquisition fees to an affiliate	(3,828)	(2,631)	(6,382)
Capital expenditures on owned real estate	(2,958)	(10,682)	(8,035)
Value added taxes paid in connection with acquisition of real estate	(1,941)	(5,712)	(37,540)
Changes in investing restricted cash	1,480	1,870	6,300
Proceeds from repayment of loan receivable	0	12,600	40,000
Deposits for investments	0	2,501	(1,000)
Proceeds from repayment of debenture	0	610	7,633
Funding of loans receivable	0	0	(42,600)
Net Cash Provided by (Used in) Investing Activities	6,676	98,316	(348,065)
Cash Flows — Financing Activities
Scheduled payments and prepayments of mortgage principal	(458,010)	(177,469)	(121,267)
Distributions paid	(224,964)	(220,991)	(215,914)
Proceeds from mortgage financing	203,478	266,970	170,233
Proceeds from Senior Credit Facility	119,235	225,693	235,367
Proceeds from issuance of shares, net of issuance costs	102,078	103,618	103,657
Repayments of Senior Credit Facility	(68,990)	(289,558)	(120,400)
Repurchase of shares	(61,896)	(49,959)	(37,091)
Distributions to noncontrolling interests	(40,290)	(38,228)	(35,716)
Contributions from noncontrolling interests	4,001	147	15,928
Payment of financing costs and mortgage deposits, net of deposits refunded	(1,058)	(2,203)	(3,544)
Other financing activities, net	(595)	(81)	0
Changes in financing restricted cash	(10)	(462)	(962)
Proceeds from notes payable to affiliate	0	0	25,000
Repayment of notes payable to affiliate	0	0	(25,000)
Net Cash Used in Financing Activities	(427,021)	(182,523)	(9,709)
Change in Cash and Cash Equivalents During the Year
Effect of exchange rate changes on cash	8,770	(6,416)	(8,940)
Net (decrease) increase in cash and cash equivalents	(154,541)	120,746	(122,830)
Cash and cash equivalents, beginning of year	273,635	152,889	275,719
Cash and cash equivalents, end of year	$ 119,094	$ 273,635	$ 152,889