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Fair Value - Recurring Basis (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Financial assets:    
Available-for-sale securities $ 191,451 $ 198,237
Level 1 [Member]
   
Financial assets:    
Available-for-sale securities 25,070 15,000
Level 2 [Member]
   
Financial assets:    
Available-for-sale securities 166,381 183,237
Recurring [Member]
   
Financial assets:    
Available-for-sale securities 191,451 198,237
Recurring [Member] | Interest Rate Swap [Member]
   
Financial assets:    
Customer interest rate swaps 295 433
Financial Liabilities:    
Correspondent interest rate swaps 319 456
Recurring [Member] | Level 1 [Member]
   
Financial assets:    
Available-for-sale securities 25,070 15,000
Recurring [Member] | Level 2 [Member]
   
Financial assets:    
Available-for-sale securities 166,381 183,237
Recurring [Member] | Level 2 [Member] | Interest Rate Swap [Member]
   
Financial assets:    
Customer interest rate swaps 295 433
Financial Liabilities:    
Correspondent interest rate swaps $ 319 $ 456