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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions			12 Months Ended
	Mar. 14, 2022	Feb. 15, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 07, 2022	Jan. 27, 2022
Subsequent Event [Line Items]
Dividends paid			$ 105,764	$ 207,765	$ 109,147
Class B | HFML | Forecast
Subsequent Event [Line Items]
Shares to be issued for acquisition of interest held in employee benefit trust	1.5
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (usd per share)							$ 0.27
Dividends paid		$ 25,000
Subsequent Event | HFML
Subsequent Event [Line Items]
Percentage of equity interests held in employee benefit trust						10.00%

X

- Definition

Equity Acquisition, Percentage Of Equity Interests Held In Employee Benefit Trust

+ References

No definition available.

+ Details

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X

- Definition

Noncontrolling Interest, Acquisition Of Additional Equity, Shares Issued

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586

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X

- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

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- Definition

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.

+ References

No definition available.

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