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Fair Value (Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis) (Details) (Level 3 [Member], Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Obligations Of States And Political Subdivisions [Member]
       
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, beginning        $ 2,598
Included in earnings - unrealized     0 (128)
Included in other comprehensive income          
Periodic, sales, issuances and settlements, other     0 (2,470)
Periodic settlement of fair value swap         
Balance, ending 0    0   
Equity Securities [Member]
       
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, beginning 738 741 763 745
Included in earnings - unrealized 0 0 0 0
Included in other comprehensive income 6 8 (19) 4
Periodic, sales, issuances and settlements, other 0 0 0 0
Periodic settlement of fair value swap 0       
Balance, ending 744 749 744 749
Fair Value Swap [Member]
       
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, at January 1, 2012 (135) (200) (700) (60)
Included in earnings - unrealized 0 0 0 0
Included in other comprehensive income 0         
Purchases, sales, issuances and settlements, other 0 0 0 0
Re-evaluation of fair value swap       (140)
Periodic settlement of fair value swap 0   (565)  
Balance at June 30, 2012 $ (135) $ (200) $ (135) $ (200)