Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Document Fiscal Year Focus			2017
Net income			$ (29,457)	$ (94,221)
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (3,805)	$ (9,846)	(3,873)	(26,631)
Other comprehensive (loss) income			1,896	(21,642)
Parent Company [Member]
Net income	(50,173)	(40,644)	(29,457)	(94,221)
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(3,805)	(9,846)	(3,873)	(26,631)
Reclassification adjustment of derivative instruments included in net income	3,071	2,500	5,726	4,952
Available-for-sale Securities, Gross Unrealized Gain	11	73	43	37
Other comprehensive (loss) income	(723)	(7,273)	1,896	(21,642)
Comprehensive income	49,450	33,371	31,353	72,579
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(680)	(568)	(1,332)	(1,003)
Other comprehensive (loss) income attributable to noncontrolling interests	(80)	(128)	(15)	(297)
Comprehensive income attributable to noncontrolling interests	600	440	1,317	706
Comprehensive income attributable to the Company	48,850	32,931	30,036	71,873
Partnership Interest [Member]
Net income	(50,173)	(40,644)	(29,457)	(94,221)
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(3,805)	(9,846)	(3,873)	(26,631)
Reclassification adjustment of derivative instruments included in net income	3,071	2,500	5,726	4,952
Available-for-sale Securities, Gross Unrealized Gain	11	73	43	37
Other comprehensive (loss) income	(723)	(7,273)	1,896	(21,642)
Comprehensive income	49,450	33,371	31,353	72,579
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(576)	(504)	(1,247)	(853)
Other comprehensive (loss) income attributable to noncontrolling interests	79	(117)	(16)	(263)
Comprehensive income attributable to noncontrolling interests	655	387	1,231	590
Comprehensive income attributable to the Company	$ 48,795	$ 32,984	$ 30,122	$ 71,989