XML 68 R33.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investment Securities - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Securities
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]            
Securities issued by U.S. government percentage 77.00%     77.00%    
Number of securities     13      
Investment securities, par value     $ 94,200,000      
Pre-tax gain on sale of securities     $ 2,100,000 $ 2,094,000    
Gains (loss) recognized 0 0        
Investment securities purchased 314,700,000          
Gross unrealized holding losses 0     0    
Book value of the bond 1,850,000     1,850,000   2,050,000
Credit-related impairment loss on investment securities held-to-maturity 0       0  
Average life of investment grade debt securities, years       4 years 9 months 18 days    
Investment securities pledged as collateral 2,610,000,000     2,610,000,000   2,240,000,000
Government agency [Member]
            
Schedule of Available-for-sale Securities [Line Items]            
Agency bond callable       144,400,000    
CMO/REMICs [Member]
            
Schedule of Available-for-sale Securities [Line Items]            
CMO/REMIC's backed by whole loans issued by private-label companies (non-government sponsored) 679,000     679,000   1,200,000
Investment security classified as held-to-maturity, number 1     1    
Held-to-Maturity securities, average FICO score 715     715    
Held-to-Maturity securities, acquired price, percentage 98.25%     98.25%    
Average percentage of LTV 71.00%     71.00%    
Current fair value percentage of Held-to-Maturity security against par value 73.00%     73.00%    
Investment contractual cash flows guaranteed by Government, percentage 99.96%     99.96%    
Investment contractual cash flows guaranteed by banks, percentage 0.04%     0.04%    
Alt-A bond [Member]
            
Schedule of Available-for-sale Securities [Line Items]            
Book value of the bond 1,800,000     1,800,000    
Net impairment losses $ 1,900,000     $ 1,900,000    
Municipal bonds [Member]
            
Schedule of Available-for-sale Securities [Line Items]            
Average life of investment grade debt securities, years       8 years 10 months 24 days