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Fair Value Measurements Schedule of Fair Value Unobservable Input Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance at beginning of period $ 0 $ 51
Included in net income 0 0
Included in other comprehensive income 0 0
Principal paydowns 0 (51)
Transfers in and (out) of Level 3 0 0
Balance at end of period $ 0 $ 0