Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (9,555)	$ 30,156	$ 2,944
Other comprehensive income (loss):
Change in fair value of interest rate hedges	3,354	(8)
Realized (gains) losses on interest rate hedges reclassified to earnings	492	0	0
Total other comprehensive income	3,846	(8)
Comprehensive income (loss) before allocation to noncontrolling interests	(5,709)	30,148	2,944
Allocation to noncontrolling interests	(401)	(1,914)	(4)
Comprehensive income (loss) allocable to common shares	$ (6,110)	$ 28,234	$ 2,940