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FAIR VALUE MEASUREMENT - Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Total gains or losses realized (unrealized)              
Included in earnings         $ (181)    
The amount of total gains or losses for the periods included in earnings attributable to the change in unrealized gains or losses relating to assets still held at reporting date         (181)    
Investment securities:              
Net securities gains (losses) realized         0    
Net securities gains (losses) unrealized         0    
Other noninterest income (loss) realized         (181)    
Other noninterest income (loss) unrealized         0    
Total realized         (181)    
Total Unrealized changes in fair value included in net income (664) 3,274 2,456 1,627 0 6,693 (598)
Other stocks and bonds
             
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]              
Balance at Beginning of Period       189 499 189  
Total gains or losses realized (unrealized)              
Included in earnings         (181) 0  
Included in other comprehensive income         672 310  
Purchases         0 0  
Issuances         0 0  
Settlements         0 0  
Transfers in and/or out of Level 3         0 0  
Balance at End of Period 499       990 499  
The amount of total gains or losses for the periods included in earnings attributable to the change in unrealized gains or losses relating to assets still held at reporting date         (181) 0  
Investment securities:              
Total realized         $ (181) $ 0