Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2021

Financial Instruments, Owned, at Fair Value [Abstract]

Estimated Fair Values of Financial Instruments

The following table presents the fair values of financial instruments:

	September 30, 2021		December 31, 2020
	(Amounts in thousands)
Assets
Investments	$	5,074,754	$	4,729,270
Note receivable	5,741		5,725
Liabilities
Options sold	473		—
Unsecured notes	420,450		415,253