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Loans and Allowances for Credit Losses Loans and Allowances for Credit Losses, Nonaccrual (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 84,315	$ 145,469
Financing Receivable, Nonaccrual, No Allowance	66,649	102,380
Financing Receivable, Nonaccrual, With Allowance	17,666	43,089
Financing Receivable, Nonaccrual, Related Allowance	2,933	2,692
Commercial [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	51,672	110,131
Financing Receivable, Nonaccrual, No Allowance	34,006	67,042
Financing Receivable, Nonaccrual, With Allowance	17,666	43,089
Financing Receivable, Nonaccrual, Related Allowance	2,933	2,692
Commercial [Member] | Healthcare [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	15,927	81,529
Financing Receivable, Nonaccrual, No Allowance	15,927	40,372
Financing Receivable, Nonaccrual, With Allowance	0	41,157
Financing Receivable, Nonaccrual, Related Allowance	0	1,478
Commercial [Member] | Services [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,425	3,616
Financing Receivable, Nonaccrual, No Allowance	1,149	1,684
Financing Receivable, Nonaccrual, With Allowance	276	1,932
Financing Receivable, Nonaccrual, Related Allowance	276	1,214
Commercial [Member] | Energy [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	28,986	17,843
Financing Receivable, Nonaccrual, No Allowance	11,596	17,843
Financing Receivable, Nonaccrual, With Allowance	17,390	0
Financing Receivable, Nonaccrual, Related Allowance	2,657	0
Commercial [Member] | General business [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	5,334	7,143
Financing Receivable, Nonaccrual, No Allowance	5,334	7,143
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Commercial real estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	12,364	7,320
Financing Receivable, Nonaccrual, No Allowance	12,364	7,320
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	20,279	28,018
Financing Receivable, Nonaccrual, No Allowance	20,279	28,018
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	13,688	18,056
Financing Receivable, Nonaccrual, No Allowance	13,688	18,056
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	71	253
Financing Receivable, Nonaccrual, No Allowance	71	253
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	0	0
US Government Agency Insured Loans [Member] | Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	6,520	9,709
Financing Receivable, Nonaccrual, No Allowance	6,520	9,709
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, Related Allowance	$ 0	$ 0

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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