Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) subsidiary entity reporting_unit	Dec. 31, 2022 USD ($)	Dec. 31, 2021 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
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	$ 107,966,000	$ 101,340,000	$ 98,576,000
Retained earnings	$ 959,604,000	863,948,000
Cumulative Effect, Period of Adoption, Adjustment
Summary of Significant Accounting Policies [Line Items]
Adjustment to allowance for credit loss		568,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2022-02
Summary of Significant Accounting Policies [Line Items]
Adjustment to allowance for credit loss		600,000
Retained earnings		$ (600,000)
Minimum | Core Deposits And Customers Lists
Summary of Significant Accounting Policies [Line Items]
Weighted average estimated useful of acquired intangibles	10 years
Maximum
Summary of Significant Accounting Policies [Line Items]
Amortization period of investments in joint ventures	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
Summary of Significant Accounting Policies [Line Items]
Period for interest rate lock commitment	60 days