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Subsequent Events - Schedule of Subordinate Note Redemption (Detail)
12 Months Ended
Dec. 31, 2013
3rd anniversary of the Initial Issue Date [Member]
 
Debt Instrument, Redemption [Line Items]  
Subordinated note redemption percentage 103.75%
4th anniversary of the Initial Issue Date [Member]
 
Debt Instrument, Redemption [Line Items]  
Subordinated note redemption percentage 101.875%
5th anniversary of the Initial Issue Date and thereafter [Member]
 
Debt Instrument, Redemption [Line Items]  
Subordinated note redemption percentage 100.00%