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v3.26.1

Borrowings - Schedule of Available Borrowing Capacity and Related Pledged Collateral (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Debt Instrument [Line Items] |  |
Available Borrowing Capacity | $ 4,119,263 | $ 3,974,188
Assets Pledged As Collateral |  |
Debt Instrument [Line Items] |  |
Pledged Collateral | 5,332,677 | 5,107,758
FRB Discount Window | Assets Pledged As Collateral |  |
Debt Instrument [Line Items] |  |
Pledged Collateral | 4,489,394 | 4,245,845
FRB Discount Window | Assets Pledged As Collateral | Loans |  |
Debt Instrument [Line Items] |  |
Pledged Collateral |  | 4,200,000
FHLB of Des Moines | Assets Pledged As Collateral |  |
Debt Instrument [Line Items] |  |
Pledged Collateral | 843,283 | 861,913
FHLB of Des Moines | Assets Pledged As Collateral | Loans |  |
Debt Instrument [Line Items] |  |
Pledged Collateral |  | 486,200
FHLB of Des Moines | Assets Pledged As Collateral | Securities |  |
Debt Instrument [Line Items] |  |
Pledged Collateral |  | 375,700
FRB Discount Window |  |
Debt Instrument [Line Items] |  |
Available Borrowing Capacity | 3,446,444 | 3,294,827
FRB Discount Window | FRB Discount Window | Assets Pledged As Collateral | Loans |  |
Debt Instrument [Line Items] |  |
Pledged Collateral | 4,500,000 |
FHLB of Des Moines |  |
Debt Instrument [Line Items] |  |
Available Borrowing Capacity | 672,819 | $ 679,361
FHLB of Des Moines | FHLB of Des Moines | Assets Pledged As Collateral | Loans |  |
Debt Instrument [Line Items] |  |
Pledged Collateral | 467,700 |
FHLB of Des Moines | FHLB of Des Moines | Assets Pledged As Collateral | Securities |  |
Debt Instrument [Line Items] |  |
Pledged Collateral | $ 375,600 |

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