Tax Credit Investments - Amortization expense and tax benefit recognized (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Tax Credit Investments [Line items]
Intangible amortization expense	$ 1,053	$ 1,088	$ 2,106	$ 2,239
Income tax benefit	(2,725)	$ (3,644)	(5,613)	$ (8,306)
Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	111		111
Income tax benefit	(156)		(156)
Low income housing tax credit | Housing projects
Tax Credit Investments [Line items]
Intangible amortization expense	111		111
Income tax benefit	$ (156)		$ (156)