Acquisitions - Schedule of fair value estimates of assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	May 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Consideration paid:
Goodwill		$ 317,873	$ 317,873
CAC
Assets acquired
Cash and cash equivalents	$ 298,637
Securities	702,367
Portfolio loans, net of ACL	430,470
Premises and equipment	17,034
Other intangible assets	17,340
Mortgage servicing rights	629
Other assets	8,176
Total assets acquired	1,474,653
Liabilities assumed
Deposits	1,315,671
Other borrowings	16,651
Other liabilities	19,205
Total liabilities assumed	1,351,527
Net assets acquired	123,126
Consideration paid:
Cash	70,358
Common stock	59,105
Total consideration paid	129,463
Goodwill	$ 6,337