Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Document Fiscal Year Focus	2018
Net income	$ (53,465)	$ 20,715
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	9,505	(68)
Other comprehensive income	11,524	2,620
Parent Company [Member]
Net income	(53,465)	20,715
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	9,505	(68)
Reclassification adjustment of derivative instruments included in net income	2,138	2,654
Available-for-sale Securities, Gross Unrealized Gain	(119)	32
Other comprehensive income	11,524	2,618
Comprehensive income (loss)	64,989	(18,097)
Less: comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(805)	(652)
Other comprehensive income attributable to noncontrolling interests	483	65
Comprehensive income attributable to noncontrolling interests	1,288	717
Comprehensive income (loss) attributable to the Company	63,701	(18,814)
Partnership Interest [Member]
Net income	(53,465)	20,715
Other comprehensive income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	9,505	(68)
Reclassification adjustment of derivative instruments included in net income	2,138	2,654
Available-for-sale Securities, Gross Unrealized Gain	(119)	32
Other comprehensive income	11,524	2,618
Comprehensive income (loss)	64,989	(18,097)
Less: comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(694)	(671)
Other comprehensive income attributable to noncontrolling interests	459	63
Comprehensive income attributable to noncontrolling interests	1,153	734
Comprehensive income (loss) attributable to the Company	$ 63,836	$ (18,831)