Summary of Significant Accounting Policies - Reconciliation of Earnings Attributable to Common Shares Outstanding for the Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Per Common Share data - Basic
Income (loss) from continuing operations	$ 210		$ (4,972)
Loss attributable to non-controlling interest	1,980		3,369
Preferred dividend of Series D Preferred Shares	(2,786)		(5,573)
Amount allocated to Restricted Common Shares	(97)	$ (192)	(192)
Loss from continuing operations applicable to Common Shares	(693)		(7,368)
Income from discontinued operations	6,772		11,151
Loss attributable to non-controlling interest from discontinued operations			54
Net income attributable to Common Shares	$ 6,079		$ 3,837
Basic Weighted-Average Common Shares	35,824		35,820
Loss from continuing operations	$ (0.02)		$ (0.20)
Income from discontinued operations	0.19		0.31
Net income per Common Share - Basic	$ 0.17		$ 0.11
Diluted
Income (loss) from continuing operations	$ 210		$ (4,972)
Loss attributable to non-controlling interest	1,980		3,369
Preferred dividend of Series D Preferred Shares	(2,786)		(5,573)
Amount allocated to Restricted Common Shares	(97)	$ (192)	(192)
Loss from continuing operations applicable to Common Shares	(693)		(7,368)
Income from discontinued operations	6,772		11,151
Loss attributable to non-controlling interest from discontinued operations			54
Net income attributable to Common Shares	$ 6,079		$ 3,837
Basic weighted-average Common Shares	35,824		35,820
Diluted weighted-average Common Shares	35,824		35,820
Loss from continuing operations	$ (0.02)		$ (0.20)
Income from discontinued operations	0.19		0.31
Net income per Common Share - Diluted	$ 0.17		$ 0.11
Restricted Shares [Member]
Per Common Share data - Basic
Amount allocated to Restricted Common Shares	$ (97)		$ (192)
Diluted
Amount allocated to Restricted Common Shares	$ (97)		$ (192)
Restricted Common Shares	0		0