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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended				6 Months Ended
	Jul. 28, 2022	Jul. 15, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022
Subsequent Event [Line Items]
Retirement of treasury stock			$ (89,542)	$ (102,537)	$ (31,797)	$ (45,030)	$ (192,100)
Subsequent Event
Subsequent Event [Line Items]
Maturity of contingent purchase price payments		5 years
Treasury stock, retired (in shares)	10,000,000
Retirement of treasury stock	$ (313,800)
Subsequent Event | Class A Shares
Subsequent Event [Line Items]
Dividends declared (usd per share)	$ 0.27
Subsequent Event | Class B Shares
Subsequent Event [Line Items]
Dividends declared (usd per share)	$ 0.27
Retirement of treasury stock	$ (42,700)
Subsequent Event | C.W. Henderson and Associates
Subsequent Event [Line Items]
Acquisition price		$ 30,000
Maximum contingent purchase price payments		$ 20,000

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Number of shares of common and preferred stock retired from treasury during the period.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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