Loans and Leases and Allowance for Credit Losses - Nonaccrual loans by loan class (Details) - Loans receivable - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Nonaccrual loans
Nonaccrual loans with no allowance	$ 16,360	$ 23,760
Nonaccrual loans with an allowance	16,452	37,839
Nonaccrual Loans	32,812	61,599
Commercial
Nonaccrual loans
Nonaccrual loans with no allowance	12,729	20,121
Nonaccrual loans with an allowance	5,086	25,394
Nonaccrual Loans	17,815	45,515
Commercial | Owner occupied commercial real estate
Nonaccrual loans
Nonaccrual loans with no allowance	2,141	6,614
Nonaccrual loans with an allowance	573	1,968
Nonaccrual Loans	2,714	8,582
Commercial | Income producing commercial real estate
Nonaccrual loans
Nonaccrual loans with no allowance	6,873	10,008
Nonaccrual loans with an allowance	715	5,141
Nonaccrual Loans	7,588	15,149
Commercial | Commercial & industrial
Nonaccrual loans
Nonaccrual loans with no allowance	3,715	2,004
Nonaccrual loans with an allowance	1,714	14,630
Nonaccrual Loans	5,429	16,634
Commercial | Construction
Nonaccrual loans
Nonaccrual loans with no allowance	0	1,339
Nonaccrual loans with an allowance	343	406
Nonaccrual Loans	343	1,745
Commercial | Equipment financing
Nonaccrual loans
Nonaccrual loans with no allowance	0	156
Nonaccrual loans with an allowance	1,741	3,249
Nonaccrual Loans	1,741	3,405
Residential | Residential mortgage
Nonaccrual loans
Nonaccrual loans with no allowance	3,126	1,855
Nonaccrual loans with an allowance	10,187	11,003
Nonaccrual Loans	13,313	12,858
Residential | HELOC
Nonaccrual loans
Nonaccrual loans with no allowance	219	1,329
Nonaccrual loans with an allowance	993	1,158
Nonaccrual Loans	1,212	2,487
Residential | Construction
Nonaccrual loans
Nonaccrual loans with no allowance	280	274
Nonaccrual loans with an allowance	140	240
Nonaccrual Loans	420	514
Consumer
Nonaccrual loans
Nonaccrual loans with no allowance	6	181
Nonaccrual loans with an allowance	46	44
Nonaccrual Loans	$ 52	$ 225