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Cash and Due from Banks	12 Months Ended
Cash and Due from Banks	Dec. 31, 2017
Cash and Due from Banks [Abstract]
Cash and Due from Banks	Cash and Due from Banks The Company maintains various deposit accounts with other banks to meet normal funds transaction requirements, to satisfy deposit reserve requirements, and to compensate other banks for certain correspondent services. Management is responsible for assessing the credit risk of its correspondent banks. The withdrawal or usage restrictions of these balances did not have a significant impact on the operations of the Company as of December 31, 2017 or 2016, because reserve requirements were covered by vault cash.