Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) entity subsidiary reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Summary of Significant Accounting Policies [Line Items]
Number of wholly owned subsidiaries | subsidiary	4
Number of entities non-banking activities | entity	6
Prior period reclassification adjustment	$ 0
Threshold for evaluation for expected credit loss of commercial loans	$ 1,000,000.0
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Premises and equipment, net	Premises and equipment, net
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Number of reporting units | reporting_unit	1
Number of wholly owned trust subsidiaries | subsidiary	2
Adjustment to allowance for credit loss	$ 101,494,000	$ 107,966,000	$ 101,340,000
Retained earnings	$ 1,039,035,000	$ 959,604,000
Cumulative Effect, Period of Adoption, Adjustment
Summary of Significant Accounting Policies [Line Items]
Adjustment to allowance for credit loss			$ 568,000
Minimum | Core Deposits And Customers Lists
Summary of Significant Accounting Policies [Line Items]
Weighted average estimated useful of acquired intangibles	10 years
Maximum | Core Deposits And Customers Lists
Summary of Significant Accounting Policies [Line Items]
Weighted average estimated useful of acquired intangibles	20 years
Common Wealth Trust Life Insurance Company | CTCLIC
Summary of Significant Accounting Policies [Line Items]
Percentage of equity owned	50.00%
Interest rate lock commitments - mortgage loans
Summary of Significant Accounting Policies [Line Items]
Period for interest rate lock commitment	60 days