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Significant Accounting Policies - Additional Information (Details)
12 Months Ended
Dec. 31, 2014
Accounting Policies [Line Items]  
Number of Operating Segments 1us-gaap_NumberOfOperatingSegments
Modified loan terms 6 months
Loan And Leases Due Period For Discontinuation Of Interest Accrual 90 days
Consumer Loans Charged Off Period 120 days
Restricted Stock [Member]  
Accounting Policies [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years
Employee Stock Option [Member]  
Accounting Policies [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years
Building [Member] | Maximum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Useful Life 40 years
Building [Member] | Minimum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Useful Life 25 years
Leasehold Improvements [Member] | Maximum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Useful Life 25 years
Leasehold Improvements [Member] | Minimum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Useful Life 5 years
Furniture and Fixtures [Member] | Maximum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Useful Life 12 years
Furniture and Fixtures [Member] | Minimum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Useful Life 3 years