Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Supplemental Disclosures:
Cash paid for interest	$ 93,713	$ 109,025
Cash paid for income taxes	10,848	51
Non-cash investing and financing activities:
Accrued capital expenditures and real estate developments	1,327	4,126
Accrued repurchases of common stock to settle tax obligation	223	0
Accrued distributions	3,157	0
Mortgage note payable relieved by foreclosure	0	53,798
Mortgage notes payable assumed in real estate disposition	$ 55,000	$ 24,000