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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details 3) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Available for Sale States and Political Subdivisions Debt Securities
   
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 $ 10,518 $ 12,826
Principal payments received (202) (2,736)
Unrealized net gain (loss) included in other comprehensive income 74 (589)
Purchases 2,325 74
Aggregate fair value / Balance at the end of the period 12,715 9,575
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 $ 12,700  
Additional disclosures    
Number of investment securities held 4  
Mortgage revenue bonds | Weighted average
   
Additional disclosures    
Discount rate (as a percent) 3.92%