Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.6.0.2
Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2014
Subsidiary
Sep. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Mar. 31, 2014
Jun. 30, 2013
Mar. 31, 2010
Dec. 31, 2016
USD ($)
Branches
loan_pool
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Proceeds from redemption of FRB stock   $ 14,400         $ 14,423 $ 0 $ 0  
Allowance for loan losses of loans receivable     $ 42,935       $ 32,429 $ 42,935    
Period of utilization rate and historical loss rates used for breaking down commitments by loan type     60 months 48 months 36 months 24 months        
General loan pools [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Number of loan pools | loan_pool             14      
Oldest four quarters [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Risk factor calculations             46.00%      
Next four quarters [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Risk factor calculations               31.00%    
Third four quarters [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Risk factor calculations                 15.00%  
Most recent four quarters [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Risk factor calculations                   8.00%
Nonperforming Financing Receivable [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Delinquency period of loans with respect to interest or principal for discontinuance of accrual of interest income (less than)             90 days      
Cash and Cash Equivalents [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Delinquency period of loans with respect to interest or principal for discontinuance of accrual of interest income (less than)             90 days      
CANADA | Full Service [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Number of branches | Branches             41      
Chun Ha and All World To Chunha Holdings Corporation [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Number of subsidiaries sold | Subsidiary 2                  
Equipment Financing Receivable [Member] | Minimum [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Intangible asset amortization period             1 year      
Equipment Financing Receivable [Member] | Maximum [Member]                    
Financing Receivable, Recorded Investment, Past Due [Line Items]                    
Intangible asset amortization period             7 years