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Loans Receivable and Allowance for Credit losses (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Participation interest in loans originated	$ 135,400,000	$ 159,300,000
Non-accrual loans, interest income lost	1,900,000	1,000,000.0
Loans returned to accrual, interest income	314,000,000,000	1,600,000
Total Nonaccrual Loans	18,783,000	5,109,000
Past due loans	3,317,402,000	3,082,418,000
Individually evaluated for impairment	54,019,000	28,272,000
Loans Receivable >90 Days and Accruing	0	0
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	85,700,000	$ 17,800,000
Individually evaluated for impairment	$ 54,000,000.0

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The balance of financing receivables that were individually evaluated for impairment.

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Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

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Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

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Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

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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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