Stock Incentive Plans - Analysis of Restricted Stock Issued (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested restricted stock, Granted	45,941
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested restricted stock, Beginning balance	4,336	1,931
Non-vested restricted stock, Granted	73,707	17,345
Options, Non-vested, Vested	(24,329)	(14,940)
Non-vested restricted stock, Ending balance	53,714	4,336