Loans and Leases - Aging Analysis of Accruing and Nonaccrual Modified Loans to Borrowers Experiencing Financial Difficult (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	$ 6,574,958	$ 6,123,230	$ 5,849,259
Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	1,948
Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	1,741
Financial Asset Not Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	6,526,419	6,093,031
Financial Asset Not Past Due | Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	1,948
Financial Asset Not Past Due | Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	1,741
Financial Asset, 30 to 89 Days Past Due | Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Financial Asset, 30 to 89 Days Past Due | Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	2,135	875
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real-Estate Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	3,275,140	3,027,955	$ 2,936,204
Real-Estate Commercial [Member] | Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	1,948
Real-Estate Commercial [Member] | Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	1,741
Real-Estate Commercial [Member] | Financial Asset Not Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	3,264,174	3,019,827
Real-Estate Commercial [Member] | Financial Asset Not Past Due | Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	1,948
Real-Estate Commercial [Member] | Financial Asset Not Past Due | Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	1,741
Real-Estate Commercial [Member] | Financial Asset, 30 to 89 Days Past Due | Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real-Estate Commercial [Member] | Financial Asset, 30 to 89 Days Past Due | Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real-Estate Commercial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	220	$ 20
Real-Estate Commercial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Accrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real-Estate Commercial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Nonaccrual Modified Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	$ 0