Loans and Allowance for Credit Losses - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan	Jan. 01, 2021 USD ($)
Receivables [Abstract]
Loans held for sale	$ 11,187,000	$ 3,966,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	11,187,000	3,966,000
Loans	9,241,861,000	9,243,174,000
Non-accrual loans	43,062,000	61,471,000
Interest income recognized on non-accrual loans	0	0
Amount modified under interagency statement	$ 14,083,000	$ 4,473,000
Number of Loans | loan	15	49
Standby letters of credit usual term	2 years
Allowance for credit losses on unfunded loan commitments	$ 20,500,000	$ 0	$ 20,500,000
PPP, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 106,600,000	667,100,000
Number of Loans | loan	0
Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 2,135,459,000	2,220,949,000
Non-accrual loans	23,029,000	46,316,000
Amount modified under interagency statement	$ 12,976,000
Number of Loans | loan	1
Percentage of troubled debt restructured loans	9210.00%
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,159,127,000	1,234,741,000
Non-accrual loans	9,153,000	6,517,000
Amount modified under interagency statement	$ 693,000	$ 2,780,000
Number of Loans | loan	9	38
Percentage of troubled debt restructured loans		62.20%
Mortgage loans with formal foreclosure proceedings	$ 4,200,000	$ 2,800,000
CARES Act, Modifications
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount modified under interagency statement	0	$ 120,300,000
Number of Loans | loan		87
Term Modification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount modified under interagency statement	13,802,000	$ 3,868,000
Term Modification | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount modified under interagency statement	12,976,000
Term Modification | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount modified under interagency statement	449,000	2,393,000
Impact of adopting ASC 326
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans			4,776,000
Allowance for credit losses on unfunded loan commitments	20,500,000		$ 20,500,000
Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	34,700,000	72,800,000
Increase (decrease) in past due loans	38,000,000
30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,006,000	19,638,000
Increase (decrease) in past due loans	4,600,000
30-59 Days Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,327,000	2,525,000
30-59 Days Past Due | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,979,000	3,269,000
60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,056,000	11,187,000
Increase (decrease) in past due loans	4,100,000
60-89 Days Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	2,109,000
60-89 Days Past Due | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,255,000	1,429,000
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	12,686,000	41,950,000
Increase (decrease) in past due loans	29,300,000
90 Days or More Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,279,000	31,634,000
Payoff	23,400,000
90 Days or More Past Due | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 2,599,000	$ 3,264,000