Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2020

Financial Instruments, Owned, at Fair Value [Abstract]

Estimated Fair Values of Financial Instruments

The following table presents the fair values of financial instruments:

	March 31, 2020		December 31, 2019
	(Amounts in thousands)
Assets
Investments	$	4,157,077	$	4,312,161
Note receivable	5,698		5,665
Liabilities
Options sold	3,154		77
Unsecured notes	406,350		394,279