Earnings per Share (Detail) - The Computations of Basic and Diluted Earnings (Loss) Per Share (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Continuing Operations:
Net income (loss) from continuing operations attributable to shareholders	$ 6,228		$ (6,325)		$ 16,112		$ (5,974)
Net income (loss) from continuing operations attributable to common shareholders	5,960		(6,325)		15,420		(5,974)
Discontinued Operations:
Discontinued operations attributable to shareholders	0		0		0		1,406
Discontinued operations attributable to common shareholders	0		0		0		1,406
Share information:
Basic weighted average common shares	17,334,330	[1]	17,127,523	[1]	17,286,258	[1]	17,045,001	[1]
Potential dilutive securities	229	[2]	0	[2]	0	[2]	0	[2]
Diluted weighted average common shares	17,334,559		17,127,523		17,286,258		17,045,001
Basic earnings (loss) per share
Income (loss) from continuing operations (dollars per share)	$ 0.34		$ (0.37)		$ 0.89		$ (0.35)
Income from discontinued operations (dollars per share)	$ 0.00		$ 0.00		$ 0.00		$ 0.08
Net income (loss) (dollars per share)	$ 0.34	[3]	$ (0.37)	[3]	$ 0.89	[3]	$ (0.27)	[3]
Diluted earnings (loss) per share
Income (loss) from continuing operations (dollars per share)	$ 0.34		$ (0.37)		$ 0.89		$ (0.35)
Income from discontinued operations (dollars per share)	$ 0		$ 0.00		$ 0		$ 0.08
Net income (loss) (dollars per share)	$ 0.34		$ (0.37)	[3]	$ 0.89		$ (0.27)	[3]
Continuing Operations [Member]
Continuing Operations:
Less: Amounts allocated to participating securities (nonvested shares and units)	268	[4]	0	[4]	692	[4]	0	[4]
Discontinued Operations:
Less: Amounts allocated to participating securities (nonvested shares and units)	268	[4]	0	[4]	692	[4]	0	[4]
Gain On Sale Of Discontinued Operations [Member]
Continuing Operations:
Less: Amounts allocated to participating securities (nonvested shares and units)	0	[4]	0	[4]	0	[4]	0	[4]
Discontinued Operations:
Less: Amounts allocated to participating securities (nonvested shares and units)	$ 0	[4]	$ 0	[4]	$ 0	[4]	$ 0	[4]

[1] Under the two-class method, basic weighted average common shares exclude outstanding nonvested, participating securities consisting of restricted share awards of 301,598 and 699,612 for the quarters ended September 30, 2014 and 2013, respectively.

[2] Anti-dilutive shares related to stock options totaled 6,000 and 18,000 for the quarters ended September 30, 2014 and 2013, respectively, and 8,667 and 18,667 for the year to date periods ended September 30, 2014 and 2013, respectively. There were dilutive shares related to stock options totaling 4,000 and 0 for the quarters ended September 30, 2014 and 2013, respectively, and 1,333 and 1,333 for the year to date periods ended September 30, 2014 and 2013, respectively. The dilutive shares resulted in potential dilutive securities of 229 and 0 for the quarter and year to date periods ended September 30, 2014 and potential dilutive securities of 0 and 0 for the quarter and year to date periods ended September 30, 2013, respectively.

[3] See Note 2. Equity Method Investments for further discussion of earnings (loss) per share for the year to date period ended September 30, 2014.

[4] Participating securities include 301,598 and 699,612 nonvested restricted shares for the quarters ended September 30, 2014 and 2013, respectively, as well as 476,149 and 413,764 restricted share units for the quarters ended September 30, 2014 and 2013, respectively.