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Securities - Variable Interest Entities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Private equity and venture capital funds | Current Investments    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount $ 13,700 $ 10,800
Private equity and venture capital funds | Unfunded Loan Commitment    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 6,500 9,300
Hedge Funds | Current Investments    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 2,900 2,700
SBIC | Current Investments    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 7,300 4,900
SBIC | Unfunded Loan Commitment    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 5,700 3,100
Affordable housing | Current Investments    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 7,600 5,100
Affordable housing | Unfunded Loan Commitment    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 2,400 4,900
Affordable housing | Tax Credits Recaptured    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 2,500 1,500
Affordable housing | Tax Credits, Including Amount Recaptured    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 12,500 11,500
Non-marketable and other equity investments | Current Investments    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 10,000 5,000
Non-marketable and other equity investments | Unfunded Loan Commitment    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount   5,000
Variable Interest Entity, Not Primary Beneficiary | Private equity and venture capital funds    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Not Primary Beneficiary, Carrying Amount 13,685 10,811
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 20,208 20,057
Variable Interest Entity, Not Primary Beneficiary, Liability Recognized 0 0
Variable Interest Entity, Not Primary Beneficiary | Hedge Funds    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Not Primary Beneficiary, Carrying Amount 2,876 2,724
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 2,876 2,724
Variable Interest Entity, Not Primary Beneficiary, Liability Recognized 0 0
Variable Interest Entity, Not Primary Beneficiary | SBIC    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Not Primary Beneficiary, Carrying Amount 7,292 4,931
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 13,000 8,000
Variable Interest Entity, Not Primary Beneficiary, Liability Recognized 0 0
Variable Interest Entity, Not Primary Beneficiary | Affordable housing    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Not Primary Beneficiary, Carrying Amount 7,634 5,073
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 12,519 11,519
Variable Interest Entity, Not Primary Beneficiary, Liability Recognized 0 0
Variable Interest Entity, Not Primary Beneficiary | Non-marketable and other equity investments    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Not Primary Beneficiary, Carrying Amount 10,000 5,000
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 10,000 5,000
Variable Interest Entity, Not Primary Beneficiary, Liability Recognized $ 0 $ 0