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Securities - Amortized Cost And Fair Value Of Securities By Contractual Maturity Of Held-To-Maturity Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Investments [Abstract]    
Due in one year or less, Amortized Cost $ 5,783  
Due after one year through five years, Amortized Cost 0  
Due after five years through ten years, Amortized Cost 1,808  
Due after ten years, Amortized Cost 1,039  
Total securities held to maturity, amortized cost 8,630 $ 11,618
Due in one year or less, Fair Value 5,783  
Due after one year through five years, Fair Value 0  
Due after five years through ten years, Fair Value 1,871  
Due after ten years, Fair Value 1,134  
Total held to maturity securities, Fair Value $ 8,788 $ 11,739