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Intangibles (Details) - Core Deposit Intangible Assets - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 11,674 $ 11,674
Less accumulated amortization (5,393) (4,840)
Net carrying amount $ 6,281 $ 6,834