v3.25.4
Investments - Offsetting of Derivative Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Offsetting Assets [Line Items]    
Derivative Assets Subject to Master Netting Agreement $ 0 $ 423
Derivatives Available for Offset 0 0
Non-cash Collateral Received 0 0
Cash Collateral Received 0 0
Net Amount of Derivative Assets 0 423
Derivative Liabilities Subject to Master Netting Agreement 40 0
Derivatives Available for Offset 0 0
Non-cash Collateral Received 0 0
Cash Collateral Received 0 0
Net Amount of Derivative Liabilities 40 0
Zions Bancorporation, N.A.    
Offsetting Assets [Line Items]    
Derivative Assets Subject to Master Netting Agreement 0 423
Derivatives Available for Offset 0 0
Non-cash Collateral Received 0 0
Cash Collateral Received 0 0
Net Amount of Derivative Assets 0 423
Derivative Liabilities Subject to Master Netting Agreement 40 0
Derivatives Available for Offset 0 0
Non-cash Collateral Received 0 0
Cash Collateral Received 0 0
Net Amount of Derivative Liabilities $ 40 $ 0