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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details 3) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 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 (71) (100)
Unrealized net gain (loss) included in other comprehensive income 299 (86)
Purchases 1,042 73
Aggregate fair value / Balance at the end of the period 11,788 12,713
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 $ 11,800  
Additional disclosures    
Number of investment securities held 4  
Mortgage revenue bonds | Weighted average
   
Additional disclosures    
Discount rate (as a percent) 3.89%