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v3.22.2.2

Loans and Allowance for Credit Losses - Additional Information (Details) | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2022 USD ($) segment portfolio | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) segment portfolio | Sep. 30, 2021 USD ($) loan | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Number of loan portfolios | portfolio | 4 |  | 4 |  |  |  |  |
Number of loan segments | segment | 7 |  | 7 |  |  |  |  |
Accrued interest receivable on loans | $ 123,600,000 |  | $ 123,600,000 |  |  | $ 47,600,000 |  |
Provision for loan losses | 10,558,000 | $ 0 | 89,089,000 | $ 0 |  |  |  |
Allowance for credit losses | 302,254,000 | 107,868,000 | $ 302,254,000 | $ 107,868,000 | $ 288,003,000 | 107,341,000 | $ 109,444,000 | $ 131,388,000
Loan placed on nonaccrual when past due, number of days |  |  | 90 days |  |  |  |  |
Loan participations | 2,300,000,000 |  | $ 2,300,000,000 |  |  |  |  |
Loan participations sold | 1,100,000,000 |  | 1,100,000,000 |  |  |  |  |
Loan participations retained | 1,200,000,000 |  | $ 1,200,000,000 |  |  |  |  |
TDR term |  |  | 6 months |  |  |  |  |
Minimum number of days for loan charge off to be recorded |  |  | 120 days |  |  |  |  |
Maximum number of days for loan charge off to be recorded |  |  | 180 days |  |  |  |  |
Financing receivable TDRs included with non-accrual loans | 23,800,000 |  | $ 23,800,000 |  |  | 11,700,000 |  |
Financing receivable TDR specific reserves | 5,200,000 |  | 5,200,000 |  |  | 700,000 |  |
Unfunded commitments on TDRs | 3,000,000 |  | 3,000,000 |  |  | 0 |  |
Financing receivable, TDR, number of loans qualified for removal | loan |  |  |  | 1 |  |  |  |
Charge-offs | 0 | (56,000) | $ (9,000) | $ (79,000) |  |  |  |
Number of days for a loan to be considered to be in payment default |  |  | 90 days |  |  |  |  |
Troubled Debt Restructurings During Period |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Increase in allowance for loan losses |  |  | $ 5,500,000 | 0 |  |  |  |
Charge-offs |  |  | 0 | 0 |  |  |  |
First Midwest |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Provision for loan losses | 10,600,000 |  | 89,100,000 |  |  |  |  |
Allowance for credit losses | $ 96,300,000 |  | $ 96,300,000 |  |  |  |  |
Commercial real estate |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |
Percentage of risk-based capital | 223.00% |  | 223.00% |  |  |  |  |
Regulatory guideline limit | 300.00% |  | 300.00% |  |  |  |  |
Provision for loan losses | $ 6,818,000 | 0 | $ 49,419,000 | 0 |  |  |  |
Allowance for credit losses | 144,090,000 | 65,097,000 | 144,090,000 | 65,097,000 | $ 141,802,000 | $ 64,004,000 | $ 65,469,000 | $ 75,810,000
Charge-offs | $ 0 | $ (58,000) | $ (4,000) | $ (72,000) |  |  |  |

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