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Loans Receivable and Allowance for Credit Losses (Narrative) (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 3,200,549,000	$ 3,317,402,000	$ 3,354,921,000
Financing Receivable, Nonaccrual, Interest Income	2,800,000	1,900,000
Loans returned to accrual, interest income	1,100,000	314,000
Amortized Cost of Loans Past due 90 days and Still Accruing	577,000	0
Business Express [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	100,449,000	$ 102,928,000	$ 96,347,000
Business Express [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 250,000

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Loans And Leases Receivable, Loans Returned To Accrual, Interest Income

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Amount of interest income on financing receivable on nonaccrual status.

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Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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