Tax Credit Investments - Amortization expense and tax benefit recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Tax Credit Investments [Line items]
Intangible amortization expense	$ 1,324	$ 1,324	$ 3,972	$ 3,430
Income tax benefit	2,381	2,940	7,222	8,553
Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	245	109	884	220
Income tax benefit	(435)	(146)	(1,171)	(303)
Low income housing tax credit | Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	245	109	884	220
Income tax benefit	$ (435)	$ (146)	$ (1,171)	$ (303)