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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	Mar. 31, 2022	Mar. 31, 2021	Dec. 09, 2015
Common Shares Class A Non-Voting [Member]
Common stock, par value (in dollars per share)	$ 1.00
Common stock, shares authorized (in shares)	15,000,000
Common Stock Shares Issued (in shares)	8,556,970	8,502,122
Common Shares Class B Voting [Member]
Common stock, par value (in dollars per share)	$ 1.00
Common stock, shares authorized (in shares)	1,040,000
Common Stock Shares Issued (in shares)	881,452	881,452
Common Stock [Member] | Common Shares Class A Non-Voting [Member]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	15,000,000	15,000,000
Common Stock Shares Issued (in shares)	8,585,947	8,531,099
Shares available for purchase through retirement plans (in shares)	200,000
Shares authorized for issuance of grants under equity compensation plan (in shares)			331,500
Common Stock [Member] | Common Shares Class B Voting [Member]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	1,040,000	1,040,000
Common Stock Shares Issued (in shares)	881,452	881,452

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Face amount or stated value per share of common stock.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

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The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested.

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-Publisher FASB
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-SubTopic 40
-Section 50
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Number of shares authorized for issuance under share-based payment arrangement.

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