CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flow from operating activities:
Net loss	$ (53,897)	$ (54,028)
Adjustments to reconcile net loss to net cash flow provided by operating activities:
Depreciation and amortization	74,424	90,884
Stock-based compensation	1,728	5,243
Amortization and write-off of debt issuance costs and fair market value of debt adjustments	10,103	906
Loss on extinguishment of debt	48,606	0
Equity in net (income) loss of joint ventures	(8,786)	1,665
Reserve of preferred equity interests, net	3,961	76,000
Operating cash distributions from joint ventures	1,786	1,806
Gain on disposition of real estate, net	(10,011)	(38,127)
Impairment charges	30,444	21,973
Interest rate hedging activities	(4,833)	0
Change in notes receivable accrued interest	818	(2,479)
Net change in accounts receivable	5,183	2,694
Net change in accounts payable and accrued expenses	(21,929)	(8,521)
Net change in other operating assets and liabilities	(19,836)	(6,109)
Total adjustments	111,658	145,935
Net cash flow provided by operating activities	57,761	91,907
Cash flow from investing activities:
Real estate acquired, net of liabilities and cash assumed	0	(86,028)
Real estate developed and improvements to operating real estate	(34,702)	(28,138)
Proceeds from disposition of real estate	135,464	113,170
Equity contributions to joint ventures	(59)	(21,506)
Distributions from unconsolidated joint ventures	16,759	2,900
Repayment of joint venture advances	36,072	0
Repayment of notes receivable	0	167
Net cash flow provided by (used for) investing activities	153,534	(19,435)
Cash flow from financing activities:
Proceeds from revolving credit facilities, net	120,000	90,000
Repayment of senior notes	(924,751)	0
Repayment of term loan and mortgage debt	(678,721)	(63,302)
Payment of debt issuance costs	(32,379)	(132)
Proceeds from mortgages payable	1,350,000	0
Issuance of common shares in conjunction with equity award plans and dividend reinvestment plan	5,149	3,500
Redemption of operating partnership units	(736)	0
Distributions to non-controlling interests and redeemable operating partnership units	(214)	(209)
Dividends paid	(78,549)	(75,253)
Net cash flow used for financing activities	(240,201)	(45,396)
Effect of foreign exchange rate changes on cash and cash equivalents	(1)	1
Net (decrease) increase in cash, cash equivalents and restricted cash	(28,906)	27,076
Cash, cash equivalents and restricted cash, beginning of period	94,724	39,225
Cash, cash equivalents and restricted cash, end of period	$ 65,817	$ 66,302