Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other comprehensive income (loss):
Effective portion of change in fair value of derivative instruments	$ (13,800)	$ 3,372
Parent Company [Member]
Net income	(25,056)	(21,134)
Other comprehensive income (loss):
Amortization of loss on settlement of derivative instruments recognized in net income	2,367	2,367
Effective portion of change in fair value of derivative instruments	(13,800)	3,372
Less: reclassification adjustment for change in fair value of derivative instruments included in net income	152	8
Other comprehensive (loss) income	(11,281)	5,747
Comprehensive income	13,775	26,881
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(401)	(314)
Other comprehensive income (loss) attributable to noncontrolling interests	(86)	15
Comprehensive income attributable to noncontrolling interests	315	329
Comprehensive income attributable to the Company	13,460	26,552
Partnership Interest [Member]
Net income	(25,056)	(21,134)
Other comprehensive income (loss):
Amortization of loss on settlement of derivative instruments recognized in net income	2,367	2,367
Effective portion of change in fair value of derivative instruments	(13,800)	3,372
Less: reclassification adjustment for change in fair value of derivative instruments included in net income	152	8
Other comprehensive (loss) income	(11,281)	5,747
Comprehensive income	13,775	26,881
Less: comprehensive income (loss) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	(359)	(275)
Other comprehensive income (loss) attributable to noncontrolling interests	(66)	4
Comprehensive income attributable to noncontrolling interests	293	279
Comprehensive income attributable to the Company	$ 13,482	$ 26,602