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Summary of Activities in Shares of Capital Stock (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Common Class A [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding	17,642,722	16,595,783
Exercise of stock options	109,587	160,282
Stock dividends	889,554	837,410
Conversion of Class C to Class A	116,168	49,247
Common Stock, Shares, Outstanding	18,758,031	17,642,722
Common Class C [Member]
Class of Stock [Line Items]
Common Stock, Shares, Outstanding	2,866,565	2,679,603
Exercise of stock options		104,656
Stock dividends	139,462	131,553
Conversion of Class C to Class A	(116,168)	(49,247)
Common Stock, Shares, Outstanding	2,889,859	2,866,565

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Other than shares newly issued, the number of additional shares issued (for example, a stock split) or canceled (for example, to correct a share issuance), during the period under the plan.

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Number of shares of common and preferred stock issued as dividends during the period. Excludes stock splits.

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