CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Cash Flows [Abstract]
Net income	$ 49,683	$ 70,507
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	142,844	142,594
Amortization of debt issuance costs and debt discounts and premiums	2,803	2,783
Straight line rental income	(6,865)	(9,306)
Amortization of acquired real estate leases and other intangible assets	(2,610)	(2,558)
Loss on early extinguishment of debt	7,353	6
Impairment of assets	5,082	12,351
Gain on sale of properties	0	(4,061)
Other non-cash adjustments	(1,887)	(1,886)
Equity in earnings of an investee	(502)	(94)
Change in assets and liabilities:
Restricted cash	(9,947)	(871)
Other assets	7,094	6,202
Accrued interest	(985)	1,459
Other liabilities	9,487	(955)
Net cash provided by operating activities	201,550	216,171
Cash flows from investing activities:
Real estate acquisitions and deposits	(15,146)	(187,150)
Real estate improvements	(57,067)	(48,657)
Proceeds from sale of properties	0	9,279
Net cash used for investing activities	(72,213)	(226,528)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	0	250,000
Proceeds from borrowings on revolving credit facility	501,000	340,000
Repayments of borrowings on revolving credit facility	(394,000)	(366,000)
Repayment of other debt	(302,476)	(31,788)
Loss on early extinguishment of debt settled in cash	(5,485)	0
Payment of debt issuance costs	0	(8,650)
Repurchase of common shares	(11)	0
Proceeds from noncontrolling interest, net	255,813	0
Distributions to noncontrolling interest	(3,483)	0
Distributions to shareholders	(185,284)	(185,228)
Net cash used for financing activities	(133,926)	(1,666)
Decrease in cash and cash equivalents	(4,589)	(12,023)
Cash and cash equivalents at beginning of period	31,749	37,656
Cash and cash equivalents at end of period	27,160	25,633
Supplemental cash flows information:
Interest paid	82,470	76,472
Income taxes paid	$ 441	$ 355