CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities
Net income (loss)	$ (457,234)	$ (126,361)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Debt modification and extinguishment costs	35	61
Depreciation and amortization, net	118,211	130,078
Goodwill and asset impairment	430,363	20,706
Equity in loss (earnings) of unconsolidated ventures	4,243	(981)
Distributions from unconsolidated ventures from cumulative share of net earnings	408	439
Amortization of deferred gain	(1,090)	(1,093)
Amortization of entrance fees	(501)	(1,198)
Proceeds from deferred entrance fee revenue	1,109	1,927
Deferred income tax provision	15,037	83,310
Straight-line lease (income) expense	(6,165)	(3,007)
Change in fair value of derivatives	(74)	46
(Gain) loss on sale of assets, net	(43,431)	603
Non-cash stock-based compensation expense	8,406	7,774
Non-cash interest expense on financing lease obligations	3,383	6,156
Amortization of (above) below market lease, net	(1,938)	(1,697)
Non-cash management contract termination fee	(2,242)	0
Other	(156)	(1,398)
Changes in operating assets and liabilities:
Accounts receivable, net	3,488	3,556
Prepaid expenses and other assets, net	(24,807)	(8,630)
Accounts payable and accrued expenses	(21,370)	(51,627)
Tenant refundable fees and security deposits	(137)	(297)
Deferred revenue	12,426	8,406
Net cash provided by operating activities	37,964	66,773
Cash Flows from Investing Activities
Change in lease security deposits and lease acquisition deposits, net	(2,015)	(420)
Sale of marketable securities, net	118,273	0
Additions to property, plant and equipment and leasehold intangibles, net	(66,592)	(48,928)
Acquisition of assets, net of related payables and cash received	(27,330)	0
Investment in unconsolidated ventures	(8,434)	(185,971)
Distributions received from unconsolidated ventures	2,037	1,807
Proceeds from sale of assets, net	75,060	31,675
Property insurance proceeds	156	1,398
Other	0	696
Net cash provided by (used in) investing activities	91,155	(199,743)
Cash Flows from Financing Activities
Proceeds from debt	30,168	34,455
Repayment of debt and capital and financing lease obligations	(44,001)	(52,273)
Payment of financing costs, net of related payables	(248)	(328)
Proceeds from refundable entrance fees, net of refunds	223	(902)
Payments of employee taxes for withheld shares	(2,618)	(5,112)
Other	372	599
Net cash used in financing activities	(16,104)	(23,561)
Net increase (decrease) in cash and cash equivalents and restricted cash and escrow deposits	113,015	(156,531)
Cash and cash equivalents and restricted cash and escrow deposits at beginning of period	282,546	277,322
Cash and cash equivalents and restricted cash and escrow deposits at end of period	$ 395,561	$ 120,791