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Fair value measurements - Summary of Level 3 financial instruments (Details) - Significant unobservable inputs (Level 3) $ in Thousands	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Discount rate
Fair value measurements
Weighted average measurement input		0.093
Minimum | Prepayment speed
Fair value measurements
Weighted average measurement input		0.15
Maximum | Prepayment speed
Fair value measurements
Weighted average measurement input		0.22
Weighted Average | Prepayment speed
Fair value measurements
Weighted average measurement input		0.22
Discounted cash flow
Fair value measurements
Mortgage servicing rights		$ 3,001
Home equity line of credit | Fair value of property or collateral
Fair value measurements
Fair value	$ 79
Commercial loans | Fair value of property or collateral
Fair value measurements
Fair value		$ 387
Residential loan | Fair value of property or collateral
Fair value measurements
Fair value	$ 125

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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+ References

No definition available.

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

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