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Interest Rate Swap Agreements - Summary of locations and amounts of losses in income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |
Periodic change in fair value of interest rate swap agreements | $ (24) | $ (364) | $ 688
Periodic settlement differentials included in interest expense | (343) | (393) |
Loss recognized in income | $ (367) | $ (757) |

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- Definition Represents pre tax income (loss) gain recognized in income. + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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