Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (116,884)	$ 26,405	$ (138,423)	$ 15,902
Other comprehensive income (loss):
Change in fair value of interest rate hedges		(36)		(156)
Realized (gains) losses on interest rate hedges reclassified to earnings		1,656		4,059
Total other comprehensive income (loss) from continuing operations		1,620		3,903
Discontinued operations:
Other comprehensive income (loss) from discontinued operations		(1,169)		(1,187)
Total other comprehensive income (loss)		451		2,716
Comprehensive income (loss) before allocation to noncontrolling interests	(116,884)	26,856	(138,423)	18,618
(Income) loss allocated to noncontrolling interests	(56)	(25,370)	(76)	(24,191)
Allocation to noncontrolling interests - other comprehensive (income) loss		1,011		1,011
Comprehensive income (loss) allocable to common shares	$ (116,940)	$ 2,497	$ (138,499)	$ (4,562)

Other comprehensive income (loss) from continuing operations net of tax.

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Other comprehensive income (loss) from discontinued operations net of tax.

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Other comprehensive income loss from discontinued operations net of tax.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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