Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Document Fiscal Year Focus			2015
Other comprehensive loss:
Effective portion of change in fair value of derivative instruments	$ (15,768)	$ (3,651)	$ (11,274)	$ (28,603)
Parent Company [Member]
Net income	(59,734)	(53,440)	(129,004)	(109,659)
Other comprehensive loss:
Amortization of loss on settled derivative instruments recognized in net income	2,011	2,107	6,225	6,639
Effective portion of change in fair value of derivative instruments	(15,768)	(3,651)	(11,274)	(28,603)
Less: reclassification adjustment for change in fair value of derivative instruments included in net income	144	153	429	459
Available-for-sale Securities, Gross Unrealized Gain	(43)	3,895	(73)	4,809
Other comprehensive (loss) income	(13,656)	2,504	(4,693)	(16,696)
Comprehensive income	46,078	55,944	124,311	92,963
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(737)	(232)	(1,823)	(1,048)
Other comprehensive (loss) income attributable to noncontrolling interests	(149)	56	(134)	(137)
Comprehensive income attributable to noncontrolling interests	588	288	1,689	911
Comprehensive income attributable to the Company	45,490	55,656	122,622	92,052
Partnership Interest [Member]
Net income	(59,734)	(53,440)	(129,004)	(109,659)
Other comprehensive loss:
Amortization of loss on settled derivative instruments recognized in net income	2,011	2,107	6,225	6,639
Effective portion of change in fair value of derivative instruments	(15,768)	(3,651)	(11,274)	(28,603)
Less: reclassification adjustment for change in fair value of derivative instruments included in net income	144	153	429	459
Available-for-sale Securities, Gross Unrealized Gain	(43)	3,895	(73)	4,809
Other comprehensive (loss) income	(13,656)	2,504	(4,693)	(16,696)
Comprehensive income	46,078	55,944	124,311	92,963
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(643)	(142)	(1,619)	(863)
Other comprehensive (loss) income attributable to noncontrolling interests	86	(92)	(127)	(108)
Comprehensive income attributable to noncontrolling interests	729	50	1,492	755
Comprehensive income attributable to the Company	$ 45,349	$ 55,894	$ 122,819	$ 92,208