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Securities - Additional Information (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
USD ($)
security
Dec. 31, 2016
USD ($)
Additional Information    
The number of holdings of securities of any one issuer other than the U.S. Government and its sponsored entities 0  
Holdings of securities as percentage of shareholders' equity, considered as threshold for disclosure purpose 10.00%  
Number of securities held 467  
Number of available for sale securities held 158  
Number of held to maturity securities held 309  
Number of securities with fair values below amortized cost 312  
Total unrealized loss for securities 12 months or more | $ $ 219  
12 Months or More | $ 2,483 $ 2,658
Municipals - exempt from Federal tax    
Additional Information    
12 Months or More | $ $ 2,064 $ 2,046