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Fair Value - Recurring Basis (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Financial assets:    
Available-for-sale securities $ 198,522 $ 198,237
Level 1 [Member]
   
Financial assets:    
Available-for-sale securities 25,079 15,000
Level 2 [Member]
   
Financial assets:    
Available-for-sale securities 173,443 183,237
Recurring [Member]
   
Financial assets:    
Available-for-sale securities 198,522 198,237
Recurring [Member] | Interest Rate Swap [Member]
   
Financial assets:    
Customer interest rate swaps 493 433
Financial Liabilities:    
Correspondent interest rate swaps 519 456
Recurring [Member] | Level 1 [Member]
   
Financial assets:    
Available-for-sale securities 25,079 15,000
Recurring [Member] | Level 2 [Member]
   
Financial assets:    
Available-for-sale securities 173,443 183,237
Recurring [Member] | Level 2 [Member] | Interest Rate Swap [Member]
   
Financial assets:    
Customer interest rate swaps 493 433
Financial Liabilities:    
Correspondent interest rate swaps $ 519 $ 456