Allowance for Loan Losses - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
Scenario, Actual [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Actual loss history experienced by the Company	5 years
Maximum [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Actual loss history experienced by the Company	5 years
Allowance for loan losses charge down family first and junior lien mortgages past due period	180 days
Allowance for loan losses charge down unsecured open end loans past due period	90 days
Allowance for loan losses charge down other secured loans past due period	90 days
Minimum [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Actual loss history experienced by the Company	1 year