Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Document Fiscal Year Focus	2017
Net income	$ 20,715	$ (53,577)
Other comprehensive (loss) income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(68)	(16,785)
Other comprehensive income (loss)	2,620	(14,368)
Parent Company [Member]
Net income	20,715	(53,577)
Other comprehensive (loss) income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(68)	(16,785)
Reclassification adjustment of derivative instruments included in net income	2,654	2,453
Available-for-sale Securities, Gross Unrealized Gain	32	(36)
Other comprehensive income (loss)	2,618	(14,368)
Comprehensive (loss) income	(18,097)	39,209
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(652)	(434)
Other comprehensive income (loss) attributable to noncontrolling interests	65	(168)
Comprehensive income attributable to noncontrolling interests	717	266
Comprehensive (loss) income attributable to the Company	(18,814)	38,943
Partnership Interest [Member]
Net income	20,715	(53,577)
Other comprehensive (loss) income:
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(68)	(16,785)
Reclassification adjustment of derivative instruments included in net income	2,654	2,453
Available-for-sale Securities, Gross Unrealized Gain	32	(36)
Other comprehensive income (loss)	2,618	(14,368)
Comprehensive (loss) income	(18,097)	39,209
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(671)	(349)
Other comprehensive income (loss) attributable to noncontrolling interests	63	(146)
Comprehensive income attributable to noncontrolling interests	734	203
Comprehensive (loss) income attributable to the Company	$ (18,831)	$ 39,006