XML 42 R53.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investment Securities (Narrative) (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Schedule of Investments [Line Items]    
Other than Temporary Impairment Losses, Investments $ 0 $ 0
Asset backed securities mortgage portfolio, term 15 years  
U.S. Treasury And Sponsored Entities Callable Notes [Member]
    
Schedule of Investments [Line Items]    
Available for Sale expected to be called 47,900,000  
Available-for-sale securities 539,000,000  
U.S. Treasury And Sponsored Entities Callable Notes [Member] | Minimum [Member]
    
Schedule of Investments [Line Items]    
Residential mortgage-backed securities and collateralized mortgage obligations, term 8 years  
U.S. Treasury And Sponsored Entities Callable Notes [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Residential mortgage-backed securities and collateralized mortgage obligations, term 13 years  
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
    
Schedule of Investments [Line Items]    
Proceeds from Sale of Available-for-sale Securities, Debt $ 0 $ 0
U.S. Government Sponsored Entities Asset-Backed Securities [Member] | Maximum [Member]
    
Schedule of Investments [Line Items]    
Residential mortgage-backed securities and collateralized mortgage obligations, term 15 years