Incentive Compensation Plan - Unvested Service-Based Restricted Stock Awards (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning of the year, Shares	253,000	50,060	34,338
Granted, Shares	58,000	224,000	35,000
Vested, Shares	(35,000)	(17,060)	(19,278)
Forfeited, Shares	(5,000)	(4,000)	0
Outstanding, end of the year, Shares	271,000	253,000	50,060
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding, beginning of the year, Weighted Average Grant Date Fair Value	$ 5.71	$ 6.00	$ 6.52
Granted, Weighted Average Grant Date Fair Value	$ 7.25	$ 5.65	$ 6.13
Vested, Weighted Average Grant Date Fair Value	$ 5.46	$ 5.73	$ 7.16
Forfeited, Weighted Average Grant Date Fair Value	$ 5.96	$ 5.96	$ 0.00
Outstanding, end of the year, Weighted Average Grant Date Fair Value	$ 6.07	$ 5.71	$ 6.00