Loans and Allowance for Credit Losses - Narrative (Details)		12 Months Ended
	Apr. 01, 2022 USD ($)	Dec. 31, 2022 USD ($) loan_segment	Dec. 31, 2021 USD ($)	Apr. 01, 2021 USD ($)	Jan. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)
Receivables [Abstract]
Loans held for sale		$ 9,094,000	$ 11,187,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale		9,094,000	11,187,000
Loans		12,003,894,000	9,241,861,000
Year 2		2,680,834,000	2,456,983,000
Year 3		1,843,080,000	778,086,000
Interest income recognized on non-accrual loans		$ 0	0
Number of portfolio loan segments | loan_segment		10
Increase in allowance for credit losses		$ 27,900,000
CECL Day 1 PCD ACL		16,599,000
CECL Day 1 non-PCD provision for credit losses		13,955,000
Net charges offs		$ 2,700,000
Standby letters of credit usual term		2 years
Accrual for off-balance sheet commitments		$ 23,300,000	20,500,000			$ 20,500,000
CECL Day 1 unfunded commitments provision for credit losses		2,800,000	0
Allowance on Collateral Dependent Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in individually evaluated for impairment		38,800,000
Level One
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans at acquisition	$ 1,627,423,000			$ 1,600,000,000
CECL Day 1 PCD ACL		16,600,000
CECL Day 1 non-PCD provision for credit losses		14,000,000
CECL Day 1 unfunded commitments provision for credit losses	$ 2,800,000
PPP, CARES Act
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		4,700,000	106,600,000
Year 2		4,600,000	100,300,000
Year 3		102,000	6,300,000
PPP, CARES Act | Level One
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans at acquisition				$ 43,500,000
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		3,437,126,000	2,714,565,000
Year 2		576,080,000	375,587,000
Year 3		$ 159,416,000	152,142,000
Percentage of troubled debt restructured loans		52.50%
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 2,096,655,000	1,159,127,000
Year 2		494,049,000	356,660,000
Year 3		$ 405,136,000	104,819,000
Percentage of troubled debt restructured loans		47.50%
Mortgage loans with formal foreclosure proceedings		$ 2,600,000	4,200,000
Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,407,475,000	2,135,459,000
Year 2		615,408,000	852,798,000
Year 3		596,899,000	$ 227,510,000
Percentage of troubled debt restructured loans			92.10%
Cumulative effect of ASC 326 adoption
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual for off-balance sheet commitments					$ 20,500,000
Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		51,000,000	$ 34,700,000
Increase (decrease) in past due loans		16,300,000
30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		29,051,000	15,006,000
Increase (decrease) in past due loans		(14,000,000)
30-59 Days Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		4,904,000	2,602,000
30-59 Days Past Due | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		8,607,000	3,979,000
30-59 Days Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		5,946,000	3,327,000
60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		5,935,000	7,056,000
Increase (decrease) in past due loans		(1,100,000)
60-89 Days Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		434,000	2,437,000
60-89 Days Past Due | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,278,000	4,255,000
60-89 Days Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		881,000	0
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		16,021,000	12,686,000
Increase (decrease) in past due loans		(3,300,000)
90 Days or More Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,474,000	987,000
90 Days or More Past Due | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		5,811,000	2,599,000
90 Days or More Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 5,153,000	$ 7,279,000