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Employee Benefit Plans (Shares Held by the ESOP Plan) (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 31, 2017
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]    
Allocated shares 1,112 1,160
Unreleased shares 19 21
Fair value of unreleased shares $ 6,448 $ 8,127
Unreleased shares non-leveraged 13 9
Fair value of unreleased shares non-leveraged $ 4,557 $ 3,539