Reconciliation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ (21,539)	$ (11,988)
(Income) loss allocated to preferred shares	(8,526)	(8,520)
(Income) loss allocated to noncontrolling interests	(20)	1,145
Income (loss) from continuing operations allocable to common shares	(30,085)	(19,363)
Income (loss) from discontinued operations	0	1,485
(Income) loss from discontinued operations allocated to noncontrolling interests		34
Income (loss) from discontinued operations allocable to common shares		1,519
Net income (loss) allocable to common shares	$ (30,085)	$ (17,844)
Weighted-average shares outstanding-Basic	91,300,812	91,018,160
Weighted-average shares outstanding—Diluted	91,300,812	91,018,160
Earnings (loss) per share-Basic:
Continuing operations	$ (0.33)	$ (0.22)
Discontinued operations		0.02
Earnings (loss) per share-Basic	(0.33)	(0.20)
Earnings (loss) per share-Diluted:
Continuing operations	(0.33)	(0.22)
Discontinued operations		0.02
Earnings (loss) per share-Diluted	$ (0.33)	$ (0.20)