Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other comprehensive (loss) income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (9,846)	$ 18,376	$ (26,631)	$ 4,494
Parent Company [Member]
Net income	(40,644)	(38,280)	(94,221)	(69,271)
Other comprehensive (loss) income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(9,846)	18,376	(26,631)	4,494
Less: reclassification adjustment of derivative instruments included in net income	2,500	2,250	4,952	4,500
Available-for-sale Securities, Gross Unrealized Gain	73	(30)	37	(30)
Other comprehensive (loss) income	(7,273)	20,596	(21,642)	8,964
Comprehensive income	33,371	58,876	72,579	78,235
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(568)	(534)	(1,003)	(1,087)
Other comprehensive (loss) income attributable to noncontrolling interests	(128)	119	(297)	15
Comprehensive income attributable to noncontrolling interests	440	653	706	1,102
Comprehensive income attributable to the Company	32,931	58,223	71,873	77,133
Partnership Interest [Member]
Net income	(40,644)	(38,280)	(94,221)	(69,271)
Other comprehensive (loss) income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(9,846)	18,376	(26,631)	4,494
Less: reclassification adjustment of derivative instruments included in net income	2,500	2,250	4,952	4,500
Available-for-sale Securities, Gross Unrealized Gain	73	(30)	37	(30)
Other comprehensive (loss) income	(7,273)	20,596	(21,642)	8,964
Comprehensive income	33,371	58,876	72,579	78,235
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(504)	(473)	(853)	(977)
Other comprehensive (loss) income attributable to noncontrolling interests	(117)	86	(263)	0
Comprehensive income attributable to noncontrolling interests	387	559	590	977
Comprehensive income attributable to the Company	$ 32,984	$ 58,317	$ 71,989	$ 77,258