Equity and Earnings (Loss) per Share - The Computations of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Continuing Operations:
Net operating income (loss)	$ 26,191	$ 23,675	$ (5,807)
Less: Amounts allocated to participating securities (non-vested shares and units)	873	832	0
Net operating income (loss) attributable to common shareholders	25,318	22,843	(5,807)
Discontinued Operations:
Discontinued operations attributable to all shareholders	0	0	878
Less: Amounts allocated to participating securities (nonvested shares and units)	0	0	0
Discontinued operations attributable to common shareholders	0	0	878
Net income (loss)	$ 25,318	$ 22,843	$ (4,929)
Share information:
Basic weighted average common shares (in Shares)	17,123,556	17,305,866	17,069,455
Incremental shares from potential dilutive securities (in Shares)	0	0	0
Diluted weighted average common shares (in Shares)	17,123,556	17,305,866	17,069,455
Basic earnings (loss) per share
Income (loss) from continuing operations (in dollars per share)	$ 1.48	$ 1.32	$ (0.34)
Income from discontinued operations (in dollars per share)	0.00	0.00	0.05
Net income (loss) (in dollars per share)	1.48	1.32	(0.29)
Diluted earnings (loss) per share
Income (loss) from continuing operations (in dollars per share)	1.48	1.32	(0.34)
Income from discontinued operations (In dollars per share)	0.00	0.00	0.05
Net income (loss) (in dollars per share)	$ 1.48	$ 1.32	$ (0.29)