Tax Credit Investments - Amortization expense and tax benefit recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Tax Credit Investments [Line items]
Intangible amortization expense	$ 5,296	$ 4,754	$ 4,380
Income tax benefit	4,158	12,177	$ 16,396
Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	1,130	264
Income tax benefit	(1,418)	(373)
Low income housing tax credit | Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	1,130	264
Income tax benefit	$ (1,418)	$ (373)