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Investment Securities (Narrative) (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Schedule Of Securities [Line Items]    
Carrying value of securities pledged $ 291,060,000 $ 317,220,000
Securities classified as trading 0 $ 0
Transferred From Available-For-Sale to Held-To-Maturity [Member]    
Schedule Of Securities [Line Items]    
Securities transferred from available-for-sale to held-to-maturity, remaining unamortized balance 3,960,000  
Securities transferred from available-for-sale to held-to-maturity, remaining unamortized balance, net of tax $ 2,570,000