Fair Value Measurements Fair Value on a Non-recurring basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	$ 5,953	$ 4,669
Other Real Estate, Foreclosed Assets, and Repossessed Assets	990	1,008
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Other Real Estate, Foreclosed Assets, and Repossessed Assets	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Other Real Estate, Foreclosed Assets, and Repossessed Assets	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	5,953	4,669
Other Real Estate, Foreclosed Assets, and Repossessed Assets	$ 990	$ 1,008