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Goodwill and Intangible Assets - Schedule of Intangible Assets and Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Goodwill And Intangible Assets Disclosure [Abstract]        
Goodwill $ 15,968us-gaap_Goodwill $ 14,047us-gaap_Goodwill    
Core deposit intangibles 11,218us-gaap_FiniteLivedCoreDepositsGross 14,471us-gaap_FiniteLivedCoreDepositsGross    
Other intangible assets 1,871us-gaap_OtherIntangibleAssetsNet      
Goodwill and intangible assets, net $ 29,057us-gaap_IntangibleAssetsNetIncludingGoodwill $ 28,518us-gaap_IntangibleAssetsNetIncludingGoodwill $ 14,047us-gaap_IntangibleAssetsNetIncludingGoodwill $ 5,201us-gaap_IntangibleAssetsNetIncludingGoodwill