Investment and Other Income (Loss), Net (Tables)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Summary of Investment and Other Income (Loss), Net

Investment and other income (loss), net consisted of the following:

	Three Months Ended September 30,				Nine Months Ended September 30,
(dollars in thousands)	2020		2019		2020		2019
Gain (loss) on equity securities	$	—	$	(5,690)	$	11,604	$	(10,258)
Investment and other income, net	1,223		3,561		6,347		7,909
Total investment and other income (loss), net	$	1,223	$	(2,129)	$	17,951	$	(2,349)