Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Document Fiscal Year Focus			2017
Net income			$ (93,039)	$ (105,334)
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (39)	$ 1,294	(3,911)	(25,338)
Other comprehensive income			4,194	22,815
Parent Company [Member]
Net income	(63,582)	(11,114)	(93,039)	(105,334)
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(39)	1,294	(3,911)	(25,338)
Reclassification adjustment of derivative instruments included in net income	2,329	43,111	8,054	48,063
Available-for-sale Securities, Gross Unrealized Gain	8	53	51	90
Other comprehensive income	2,298	44,458	4,194	22,815
Comprehensive income	65,880	55,572	97,233	128,149
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(769)	(543)	(2,101)	(1,545)
Other comprehensive income (loss) attributable to noncontrolling interests	5	158	(11)	(139)
Comprehensive income attributable to noncontrolling interests	774	701	2,090	1,406
Comprehensive income attributable to the Company	65,106	54,871	95,143	126,743
Partnership Interest [Member]
Net income	(63,582)	(11,114)	(93,039)	(105,334)
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(39)	1,294	(3,911)	(25,338)
Reclassification adjustment of derivative instruments included in net income	2,329	43,111	8,054	48,063
Available-for-sale Securities, Gross Unrealized Gain	8	53	51	90
Other comprehensive income	2,298	44,458	4,194	22,815
Comprehensive income	65,880	55,572	97,233	128,149
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(637)	(527)	(1,884)	(1,380)
Other comprehensive income (loss) attributable to noncontrolling interests	0	91	(17)	(172)
Comprehensive income attributable to noncontrolling interests	637	618	1,867	1,208
Comprehensive income attributable to the Company	$ 65,243	$ 54,954	$ 95,366	$ 126,941