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Fair Value Measurements Fair Value, Assets Measured on Nonrecurring Basis, Valuation Techniques (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other Real Estate Owned   $ 1,100
Fair Value, Measurements, Nonrecurring    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Impaired Financing Receivable, with Related Allowance, Recorded Investment $ 2,358 4,476
Other Real Estate Owned 552 1,145
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Impaired Financing Receivable, with Related Allowance, Recorded Investment 2,358 4,476
Other Real Estate Owned $ 552 $ 1,145
Fair Value Measurements, Valuation Processes, Description Appraisal of collateral Appraisal of collateral
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings, Description Appraisal adjustments Appraisal adjustments