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Investment and Other Income (Loss), Net
 6 Months Ended
Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Investment and Other Income (Loss), Net Investment and other income (loss), net
Investment and other income (loss), net consisted of the following:
Three Months Ended June 30,Six Months Ended June 30,
(dollars in thousands)2020201920202019
Gain (loss) on equity securities$70,683  $(42,693) $11,604  $(4,568) 
Investment and other income, net2,092  2,165  5,124  4,348  
Total investment and other income (loss), net$72,775  $(40,528) $16,728  $(220) 
Gain (loss) on equity securities includes the realized and unrealized holding gains and losses on our equity securities.