Incentive Compensation Plan - Unvested Target Award (Detail)	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
Restricted Stock [Member]
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	151,333	93,333	0
Granted, Shares	138,611	74,000	126,000
Vested, Shares	0	0	0
Forfeited, Shares	(39,167)	(16,000)	(32,667)
Outstanding, end of the year, Shares	250,777	151,333	93,333