Incentive Compensation Plans (Summary of Equity Compensation Expensed) (Details) - USD ($)	11 Months Ended	12 Months Ended
Mar. 09, 2020	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Incentive Compensation Plans [Abstract]
Equity compensation expense	$ 0	$ 59,016,000	$ 1,701,000
Deferred tax benefit recognized		7,336,000	166,000
Actual tax benefit recognized		$ 6,067,000	$ 152,000

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section S99
-Paragraph 1
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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