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Non-interest Revenue Non-interest Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | $ 1,079 | $ 1,139 | $ 2,383 | $ 2,348
Noninterest income out of scope of ASU 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 142 | 134 | 541 | 341
Noninterest income in scope of ASU 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 937 | 1,005 | 1,842 | 2,007
Depository fees and charges | Noninterest income in scope of ASU 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contract with Customer | 854 | 851 | 1,687 | 1,746
Loan fees and service charges | Noninterest income in scope of ASU 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contract with Customer | 67 | 127 | 122 | 225
Other noninterest income | Noninterest income in scope of ASU 606 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from Contract with Customer | $ 16 | $ 27 | $ 33 | $ 36

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