Investment Securities (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Cost
Equity	$ 312,999	$ 304,305
Debt	801,320	774,580
Other	1,426	19,102
Total	1,115,745	1,097,987
Gains
Equity	150,402	280,127
Debt	349	4,859
Other	0	0
Total	150,751	284,986
Losses
Equity	(6,975)	(4,682)
Debt	(32,819)	(7,001)
Other	0	(1)
Total	(39,794)	(11,684)
Fair Value
Equity	456,426	579,750
Debt	768,850	772,438
Other	1,426	19,101
Total	$ 1,226,702	$ 1,371,289