Organization and Basis of Presentation - Summary of Financial Securities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Equity securities:
Gross Unrealized Gain (Loss)	$ (24,585)	$ 6,276
Carrying Value	800		$ 800
Available for sale
Equity and Debt Securities, Amortized Cost	144,458		142,398
Equity and Debt Securities, Gross Unrealized Gain (Loss)	25,244		49,431
Equity and Debt Securities, Marketable Securities	169,702		191,829
Investment funds - debt securities
Equity securities:
Cost	62,382		62,192
Gross Unrealized Gain (Loss)	(4,638)		(502)
Carrying Value	57,744		61,690
Common stock and stock funds
Equity securities:
Cost	81,026		79,155
Gross Unrealized Gain (Loss)	29,143		49,592
Carrying Value	110,169		128,747
Investment-grade unsecured debt
Available for sale
Cost	1,050		1,051
Gross Unrealized Gain (Loss)	739		341
Carrying Value	$ 1,789		$ 1,392

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Amount of investment in marketable security.

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