Other assets and other liabilities - Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Other Assets And Other Liabilities [Abstract]
Deferred compensation	$ 2,173	$ 2,581
Accrued payroll	22,138	35,827
Mortgage buyback reserve	4,802	5,928
Accrued interest	3,162	6,772
Derivatives	21,000	48,242
Deferred tax liability	6,820	0
FHLB lender risk account guaranty	8,372	6,183
Reserve for unfunded commitments	14,380	16,378
Other liabilities	27,102	42,489
Accrued expenses and other liabilities	$ 109,949	$ 164,400