CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 70,507	$ 76,176
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	142,594	116,218
Amortization of deferred financing fees and debt discounts and premiums	2,783	3,096
Straight line rental income	(9,306)	(8,699)
Amortization of acquired real estate leases and other intangible assets	(2,558)	(2,376)
Loss on early extinguishment of debt	6	1,448
Impairment of assets	12,351	602
Gain on sale of properties	(4,061)
Gain on sale of investments		(71)
Other non-cash adjustments	(1,886)	(510)
Equity in earnings of an investee	(94)	(95)
Change in assets and liabilities:
Restricted cash	(871)	1,423
Other assets	6,202	(2,803)
Accrued interest	1,459	1,212
Other liabilities	(955)	30,914
Cash provided by operating activities	216,171	216,535
Cash flows from investing activities:
Real estate acquisitions and deposits	(187,150)	(1,103,732)
Real estate improvements	(48,657)	(35,322)
Investment in The RMR Group Inc		(16,528)
Proceeds from sale of properties	9,279	1,750
Proceeds from sale of investments		6,571
Cash used for investing activities	(226,528)	(1,147,261)
Cash flows from financing activities:
Proceeds from issuance of common shares, net		659,502
Proceeds from issuance of senior unsecured notes	250,000
Proceeds from borrowings on revolving credit facility	340,000	1,210,000
Repayments of borrowings on revolving credit facility	(366,000)	(675,000)
Repayment of other debt	(31,788)	(66,431)
Loss on early extinguishment of debt settled in cash		(1,523)
Payment of debt issuance costs	(8,650)
Distributions to shareholders	(185,228)	(171,185)
Cash (used for) provided by financing activities	(1,666)	955,363
Increase in cash and cash equivalents	(12,023)	24,637
Cash and cash equivalents at beginning of period	37,656	27,594
Cash and cash equivalents at end of period	25,633	52,231
Supplemental cash flow information:
Interest paid	76,472	69,541
Income taxes paid	$ 355	$ 477
Non-cash investing activities:
Investment acquired by issuance of common shares		(44,461)
Acquisitions funded by assumed debt		$ (169,136)
Non-cash financing activities:
Assumption of mortgage notes payable		169,136
Issuance of common shares		$ 46,503