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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details 3) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Available for sale debt securities - States and political subdivisions
   
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis    
Aggregate fair value / Balance at the beginning of the period $ 12,826 $ 12,994
Principal payments received (2,736) (285)
Unrealized net gain (loss) included in other comprehensive income (589) 304
Purchases, sales, issuances and settlements, net 74  
Aggregate fair value / Balance at the end of the period 9,575 13,013
Mortgage revenue bonds
   
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis    
Aggregate fair value / Balance at the end of the period $ 9,600  
Additional disclosures    
Number of investment securities held 4  
Mortgage revenue bonds | Weighted average
   
Additional disclosures    
Discount rate (as a percent) 4.84%