Investment Securities (Tables)

6 Months Ended

Jun. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Summary of debt and equity securities

The following tables summarize debt and equity securities as of June 30, 2024 and December 31, 2023.

	Gross Unrealized
	(dollars in thousands)
June 30, 2024	Cost		Gains		Losses		Fair Value
Equity	$	354,561	$	279,893	$	(6,177)	$	628,277
Debt	840,701		2,621		(22,189)		821,133
Other	14,734		113		(97)		14,750
Total	$	1,209,996	$	282,627	$	(28,463)	$	1,464,160

	Gross Unrealized
	(dollars in thousands)
December 31, 2023	Cost		Gains		Losses		Fair Value
Equity	$	344,669	$	246,795	$	(5,549)	$	585,915
Debt	908,316		3,938		(25,181)		887,073
Other	2,889		61		(36)		2,914
Total	$	1,255,874	$	250,794	$	(30,766)	$	1,475,902