Investments in Debt and Equity Securities (Tables)

3 Months Ended

Mar. 31, 2019

Investments in Debt and Equity Securities

Summary of debt and equity securities

	Gross Unrealized
	(dollars in thousands)
							Fair
March 31, 2019	Cost		Gains		Losses		Value
Equity	$	253,840	$	103,643	$	(6,518)	$	350,965
Debt		282,170		4,155		(1,715)		284,610
Other		4,654		—		—		4,654
Total	$	540,664	$	107,798	$	(8,233)	$	640,229

	Gross Unrealized
	(dollars in thousands)
							Fair
December 31, 2018	Cost		Gains		Losses		Value
Equity	$	251,226	$	64,954	$	(9,105)	$	307,075
Debt		278,030		1,718		(4,955)		274,793
Other		3,075		—		—		3,075
Total	$	532,331	$	66,672	$	(14,060)	$	584,943