Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

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, 2018		December 31, 2017
	(Amounts in thousands)
Assets
Investments	$	3,724,116	$	3,732,728
Note receivable	5,524		5,565
Liabilities
Total return swap	$	801	$	1,200
Options sold	505		123
Unsecured notes	375,161		385,583