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Stock Options, ESOP, and Restricted Shares - Summary of Activity in the 2010 Plan (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Roll Forward]  
Non-vested options, Number of Shares, Beginning Balance 236,062
Granted, Shares   
Exercised, Shares   
Forfeited, Shares   
Non-vested options, Number of Shares, Ending Balance 236,062
Options exercisable, Shares 141,637
Average Exercise Price, Beginning Balance $ 11.50
Average Exercise Price, Ending Balance $ 11.50
Options exercisable, Average Exercise Price $ 11.50
Aggregate Intrinsic Value, Beginning Balance   
Granted, Aggregate Intrinsic Value   
Exercised, Aggregate Intrinsic Value   
Forfeited, Aggregate Intrinsic Value   
Aggregate Intrinsic Value, Ending Balance 2,006,527
Options exercisable, Aggregate Intrinsic Value $ 1,203,916