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Employee Benefit Plans (Summary of Financing Arrangements for Leveraged ESOP Debt) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Issued June, 1991 [Member] |  |  |
Debt Disclosure [Abstract] |  |  |
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount | $ 31 |  |
Employee stock ownership plan (ESOP), interest payments | 2 | $ 10 | $ 48
Issued July, 2009 [Member] |  |  |
Debt Disclosure [Abstract] |  |  |
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount | 775 |  |
Employee stock ownership plan (ESOP), interest payments | 36 | 33 | 31
Issued February, 2016 [Member] |  |  |
Debt Disclosure [Abstract] |  |  |
Employee stock ownership plan (ESOP), debt structure, indirect loan, amount | 5,245 |  |
Employee stock ownership plan (ESOP), interest payments |  |  |

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- References No definition available. + Details
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- Definition The amount reported as a liability as of the balance sheet date by the entity (the employer) of the loan made by a third-party lender to the employer relating to loans made by the employer to the ESOP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Indirect Loan -URI http://asc.fasb.org/extlink&oid=6515647 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 25 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65888597&loc=d3e16545-113920 + Details
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- Definition An entity often discloses the amount of interest paid by the ESOP to a lender. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 25 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=65888597&loc=d3e16545-113920 + Details
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