Loans and Allowance for Credit Losses Activity in the Allowance for Credit Losses (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 278,695,000	$ 243,705,000	$ 269,366,000	$ 249,001,000	$ 249,001,000
Loans charged off	(4,787,000)	(1,618,000)	(21,690,000)	(3,518,000)
Recoveries of loans previously charged off	2,816,000	5,367,000	5,715,000	8,321,000
Net loans (charged off) recovered	(1,971,000)	3,749,000	(15,975,000)	4,803,000
Provision for credit losses	10,718,000	1,110,000	34,051,000	(5,240,000)
Ending balance	287,442,000	248,564,000	287,442,000	248,564,000	$ 269,366,000
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(971,000)	390,000	240,000	(210,000)
Off-Balance-Sheet, Credit Loss, Liability	$ 16,568,000	$ 14,323,000	$ 16,568,000	$ 14,323,000