Quarterly report pursuant to Section 13 or 15(d)

Sale of Insurance Subsidiaries and Discontinued Operations - Additional Information (Detail)

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Sale of Insurance Subsidiaries and Discontinued Operations - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2014
Jun. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Chun Ha and All World To Chunha Holdings Corporation [Member]
Installment
Subsidiary
Mar. 31, 2014
Discontinued operations [Member]
Jun. 30, 2014
Discontinued operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Total sale price           $ 3,500,000    
Sale consideration received           2,000,000    
Reduction by cash and cash equivalents included in net assets           1,600,000    
Net proceeds from sales of subsidiaries       398,000   398,000    
Consideration due           1,500,000    
Discontinued operations held for sale, Description           The total sales price was $3.5 million, of which $2.0 million was paid upon signing. The $2.0 million was reduced by $1.6 million cash and cash equivalents included in net assets of Chun-Ha and All World, resulting in $398,000 net cash proceeds. The remaining $1.5 million will be payable in three equal installments on each anniversary of the closing date through June 30, 2017.    
Number of installments payable           3    
Number of subsidiaries sold           2    
Net loss from discontinued operations   467,000 (70,000) 444,000 (161,000)      
Income from discontinued operation per diluted share   $ 0.01   $ (0.02) $ 0.01      
Gain on disposal       51,000        
Income tax benefit from operating loss       4,000        
Capital gain tax       470,000        
Operating loss   (52,000) 112,000 (14,000) 242,000      
Noninterest income 14,321,000   6,059,000 25,237,000 19,945,000   1,300,000 2,700,000
Noninterest expense $ 26,763,000   $ 17,636,000 $ 63,595,000 $ 53,898,000   $ 1,400,000 $ 2,700,000