CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities
Net income (loss)	$ (622,743)	$ (172,698)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Debt modification and extinguishment costs	44	754
Depreciation and amortization, net	236,655	253,657
Goodwill and asset impairment	446,466	22,265
Equity in loss of unconsolidated ventures	5,567	3,589
Distributions from unconsolidated ventures from cumulative share of net earnings	1,147	892
Amortization of deferred gain	(2,179)	(2,186)
Amortization of entrance fees	(837)	(2,030)
Proceeds from deferred entrance fee revenue	1,398	3,952
Deferred income tax (benefit) provision	(991)	80,373
Straight-line lease (income) expense	(8,595)	(6,126)
Change in fair value of derivatives	143	85
(Gain) loss on sale of assets, net	(66,753)	1,150
Loss on facility lease termination and modification, net	133,423	6,368
Non-cash stock-based compensation expense	14,675	15,020
Non-cash interest expense on financing lease obligations	6,446	10,021
Amortization of (above) below market lease, net	(3,574)	(3,394)
Non-cash management contract termination fee	(5,076)	0
Other	(156)	(2,969)
Changes in operating assets and liabilities:
Accounts receivable, net	10,956	11,957
Prepaid expenses and other assets, net	1,878	18,979
Trade accounts payable and accrued expenses	(57,615)	(47,982)
Tenant refundable fees and security deposits	(303)	(215)
Deferred revenue	8,608	9,070
Net cash provided by operating activities	98,584	200,532
Cash Flows from Investing Activities
Change in lease security deposits and lease acquisition deposits, net	(2,962)	5
Sale of marketable securities, net	273,273	(29,779)
Additions to property, plant and equipment and leasehold intangibles, net	(120,458)	(89,570)
Acquisition of assets, net of related payables and cash received	(271,320)	(400)
Investment in unconsolidated ventures	(8,864)	(186,166)
Distributions received from unconsolidated ventures	9,397	8,045
Proceeds from sale of assets, net	130,897	34,455
Property insurance proceeds	156	2,969
Other	1,393	947
Net cash provided by (used in) investing activities	11,512	(259,494)
Cash Flows from Financing Activities
Proceeds from debt	279,919	92,571
Repayment of debt and capital and financing lease obligations	(466,267)	(89,204)
Proceeds from line of credit	200,000	0
Repayment of line of credit	(200,000)	0
Payment of financing costs, net of related payables	(3,191)	(1,181)
Proceeds from refundable entrance fees, net of refunds	52	(1,554)
Payments for lease termination	(10,548)	(552)
Payments of employee taxes for withheld shares	(2,715)	(5,320)
Other	770	1,054
Net cash used in financing activities	(201,980)	(4,186)
Net decrease in cash, cash equivalents and restricted cash	(91,884)	(63,148)
Cash, cash equivalents and restricted cash at beginning of period	282,546	277,322
Cash, cash equivalents and restricted cash at end of period	$ 190,662	$ 214,174