Investments - Narrative (Details) $ in Thousands	6 Months Ended			12 Months Ended
	Jun. 30, 2022 USD ($) security	Jun. 30, 2022 USD ($) security	Jun. 30, 2022 USD ($) security Rate	Dec. 31, 2021 USD ($) security
Investments, Debt and Equity Securities [Abstract]
Vertical risk retention interest		5.00%	5.00%
Trading investments	$ 47,707	$ 47,707	$ 47,707	$ 37,465
Number of available-for-sale securities with unrealized losses | security	181	181	181	60
Number of available-for-sale securities | security	194	194	194	180
Par value of mortgage-backed securities pledged to FRB	$ 680,000	$ 680,000	$ 680,000	$ 888,000
Non-marketable securities investment	69,000	69,000	69,000	69,000
Low income housing tax credit investments	64,000	64,000	64,000	68,000
Low income housing tax credit investments, liability for unfunded commitments	28,000	$ 28,000	$ 28,000	30,000
Low income housing tax credit investments, tax credits and benefits (less than)	$ 1,000			$ 7,000
Low income housing tax credit investments, expected tax benefits recognized		25.00%