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Fair Value Measurement - Level 3 estimated fair value (Details) $ in Thousands	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Mar. 31, 2025
Measurement input, discount rate | Collateral Dependent Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans	30
Minimum | Measurement input, property specific adjustment | Collateral Dependent Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans	1		1
Maximum | Measurement input, property specific adjustment | Collateral Dependent Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans	10		10
Weighted average | Measurement input, property specific adjustment | Collateral Dependent Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans	2	3
Weighted average | Measurement input, discount rate | Collateral Dependent Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans	30
Nonrecurring | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets measured at fair value	$ 18,518	$ 39,043
Nonrecurring | Level 3 | Measurement input, property specific adjustment | Collateral Dependent Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets measured at fair value	17,789	$ 39,043
Nonrecurring | Level 3 | Measurement input, discount rate | Collateral Dependent Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets measured at fair value	$ 729

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