Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2025 USD ($) subsidiary segment reporting_unit	Dec. 31, 2024 USD ($)
Summary of Significant Accounting Policies [Line Items]
Number of wholly owned subsidiaries | subsidiary	4
Prior period reclassification adjustment	$ 0
Threshold for evaluation for expected credit loss of commercial loans	$ 1,000,000.0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Decrease in other assets	Decrease in other assets
Number of reporting units | reporting_unit	1
Number of wholly owned trust subsidiaries | subsidiary	2
Retained earnings	$ 1,120,297,000	$ 1,039,035,000
Decrease in other assets	$ (219,115,000)	$ (262,342,000)
Number of operating segment | segment	1
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 (in days)	60 days