Investment Securities - Carrying value of other investment securities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Other investment securities
Carrying Value	$ 179,815	$ 160,568
Impairment on other investment securities	0
Federal Home Loan Bank stock
Other investment securities
Carrying Value	15,095	16,283
Federal Reserve Bank Stock
Other investment securities
Carrying Value	150,261	129,716
Investment in unconsolidated subsidiaries
Other investment securities
Carrying Value	3,563	3,563
Other nonmarketable investment securities
Other investment securities
Carrying Value	$ 10,896	$ 11,006