Tax Credit Investments - Amortization expense and tax benefit recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Tax Credit Investments [Line items]
Intangible amortization expense	$ 1,324	$ 1,088	$ 3,430	$ 3,327
Income tax benefit	2,940	$ 4,064	8,553	$ 12,370
Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	109		220
Income tax benefit	(146)		(303)
Low income housing tax credit | Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	109		220
Income tax benefit	$ (146)		$ (303)