CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 8,342	$ (34,694)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	62,570	68,095
Net amortization of debt premiums, discounts and issuance costs	7,162	8,264
Amortization of acquired real estate leases	126,409	157,108
Amortization of deferred leasing costs	5,208	4,329
Gain on sale of real estate	(10,822)	(33,538)
Loss on impairment of real estate	2,954	14,105
Loss on early extinguishment of debt	2,701	769
Straight line rental income	(12,963)	(19,365)
Other non-cash expenses, net	1,542	1,907
Loss on equity securities, net	0	44,007
Equity in net losses of investees	815	573
Change in assets and liabilities:
Rents receivable	(4,853)	17,185
Deferred leasing costs	(10,722)	(22,759)
Other assets	(860)	(32)
Accounts payable and other liabilities	(11,593)	(30,603)
Due to related persons	208	(27,213)
Net cash provided by operating activities	166,098	148,138
CASH FLOWS FROM INVESTING ACTIVITIES:
Real estate acquisitions	(11,864)	0
Real estate improvements	(55,135)	(39,010)
Proceeds from sale of properties, net	81,528	572,131
Proceeds from repayment of mortgage note receivable	2,880	0
Proceeds from sale of RMR Inc. common shares, net	0	104,674
Net cash provided by investing activities	18,104	639,768
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of mortgage notes payable	(154,734)	(11,001)
Repayment of unsecured term loans	0	(388,000)
Repayment of senior unsecured notes	(400,000)	(350,000)
Proceeds from issuance of senior unsecured notes, net	408,932	0
Borrowings on unsecured revolving credit facility	561,467	420,000
Repayments on unsecured revolving credit facility	(561,467)	(385,000)
Payment of debt issuance costs	(1,477)	0
Repurchase of common shares	(434)	(459)
Distributions to common shareholders	(79,546)	(79,356)
Net cash used in financing activities	(227,259)	(793,816)
Decrease in cash, cash equivalents and restricted cash	(43,057)	(5,910)
Cash, cash equivalents and restricted cash at beginning of period	100,696	38,943
Cash, cash equivalents and restricted cash at end of period	57,639	33,033
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	83,116	114,226
Income taxes paid	1,097	491
SUPPLEMENTAL DISCLOSURE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	57,639	33,033
Unconsolidated Joint Ventures
CASH FLOWS FROM INVESTING ACTIVITIES:
Distributions in excess of earnings from unconsolidated joint ventures	408	1,973
AIC
CASH FLOWS FROM INVESTING ACTIVITIES:
Distributions in excess of earnings from unconsolidated joint ventures	$ 287	$ 0