Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Financial Instruments, Owned, at Fair Value [Abstract]

Estimated Fair Values of Financial Instruments

The following table presents the fair values of financial instruments:

	December 31,
	2021		2020
	(Amounts in thousands)
Assets
Investments	$	5,142,589	$	4,729,270
Note receivable	—		5,725
Liabilities
Options sold	301		—
Notes payable	413,378		415,253