Derivatives (Table Text Block)	12 Months Ended
Mar. 31, 2020
Derivative Instrument Detail [Abstract]
Derivative Fair Values Located in Accounts Payable and Accrued Expenses in the Balance Sheet	March 31, 2020 March 31, 2019 (In thousands) Interest rate contracts designated as hedging instruments Assets $ – $ 139 Liabilities 8,214 – Notional amount (debt) 235,000 22,792
Effect of Interest Rate Contracts on the Statement of Operations	The Effect of Interest Rate Contracts on the Statements of Operations Years Ended March 31, 2020 2019 2018 (In thousands) (Gain) loss recognized in AOCI on interest rate contracts $ 8,356 $ (633) $ (4,445) (Gain) loss reclassified from AOCI into income $ (401) $ 789 $ 3,893

Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4E
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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