Investments in Partially Owned Entities - Partially Owned Property Income Statement Schedule (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Partially Owned Property Income Statement Schedule
Operating information for the quarter ended 3/31/17 (at 100%):	$ 604,100	$ 619,083
Property management	22,252	23,495
General and administrative	14,173	16,717
Depreciation	178,968	172,885
Operating income	204,371	216,625
Interest and other income	601	3,058
Interest:
Expense incurred, net	(106,210)	(213,492)
Amortization of deferred financing costs	(2,296)	(5,394)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	95,376	(1,759)
Income and other tax (expense) benefit	(262)	(350)
(Loss) from investments in unconsolidated entities	(1,073)	(1,104)
Net income	149,941	$ 3,731,831
Consolidated VIE
Partially Owned Property Income Statement Schedule
Operating information for the quarter ended 3/31/17 (at 100%):	23,028
Operating expenses	5,676
Net operating income	17,352
Property management	813
General and administrative	16
Depreciation	5,201
Operating income	11,322
Interest and other income	13
Interest:
Expense incurred, net	(3,312)
Amortization of deferred financing costs	(68)
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	7,955
Income and other tax (expense) benefit	(34)
(Loss) from investments in unconsolidated entities	(411)
Net income	7,510
Unconsolidated Non-VIE
Partially Owned Property Income Statement Schedule
Operating information for the quarter ended 3/31/17 (at 100%):	6,602
Operating expenses	2,205
Net operating income	4,397
Property management	194
General and administrative	0
Depreciation	2,645
Operating income	1,558
Interest and other income	0
Interest:
Expense incurred, net	(2,072)
Amortization of deferred financing costs	0
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	(514)
Income and other tax (expense) benefit	(12)
(Loss) from investments in unconsolidated entities	0
Net income	(526)
Unconsolidated VIE
Partially Owned Property Income Statement Schedule
Operating information for the quarter ended 3/31/17 (at 100%):	1,385
Operating expenses	736
Net operating income	649
Property management	19
General and administrative	25
Depreciation	1,375
Operating income	(770)
Interest and other income	0
Interest:
Expense incurred, net	0
Amortization of deferred financing costs	0
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	(770)
Income and other tax (expense) benefit	0
(Loss) from investments in unconsolidated entities	0
Net income	(770)
Partially Owned Properties – Unconsolidated
Partially Owned Property Income Statement Schedule
Operating information for the quarter ended 3/31/17 (at 100%):	7,987
Operating expenses	2,941
Net operating income	5,046
Property management	213
General and administrative	25
Depreciation	4,020
Operating income	788
Interest and other income	0
Interest:
Expense incurred, net	(2,072)
Amortization of deferred financing costs	0
Income (loss) before income and other taxes, (loss) from investments in unconsolidated entities, net gain on sales of real estate properties and land parcels and discontinued operations	(1,284)
Income and other tax (expense) benefit	(12)
(Loss) from investments in unconsolidated entities	0
Net income	$ (1,296)