Disclosures about Fair Value of Assets and Liabilities - Quantitative Information about Unobservable Inputs (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Quantitative information about unobservable inputs
Servicing rights	$ 143,867	$ 146,248
Level 3
Quantitative information about unobservable inputs
Collateral-dependent impaired loans		4,465
Level 3 \| Servicing rights \| Loans funded through PPP, CARES Act
Quantitative information about unobservable inputs
Servicing rights	$ 5,083	$ 4,632
Level 3 \| Servicing rights \| Loans funded through PPP, CARES Act \| Discount Rate \| Weighted average
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.16	0.16
Level 3 \| Servicing rights \| Loans funded through PPP, CARES Act \| Constant Prepayment Rate \| Minimum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.03	0.03
Level 3 \| Servicing rights \| Loans funded through PPP, CARES Act \| Constant Prepayment Rate \| Maximum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.12	0.12
Level 3 \| Servicing rights \| Loans funded through PPP, CARES Act \| Constant Prepayment Rate \| Weighted average
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.08	0.08
Level 3 \| Servicing rights \| Single Family
Quantitative information about unobservable inputs
Servicing rights	$ 29,078	$ 29,926
Level 3 \| Servicing rights \| Single Family \| Discount Rate \| Minimum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.09	0.09
Level 3 \| Servicing rights \| Single Family \| Discount Rate \| Maximum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.10	0.10
Level 3 \| Servicing rights \| Single Family \| Discount Rate \| Weighted average
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.09	0.09
Level 3 \| Servicing rights \| Single Family \| Constant Prepayment Rate \| Minimum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.07	0.07
Level 3 \| Servicing rights \| Single Family \| Constant Prepayment Rate \| Maximum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.10	0.10
Level 3 \| Servicing rights \| Single Family \| Constant Prepayment Rate \| Weighted average
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.07	0.07
Level 3 \| Servicing rights \| Multi-family
Quantitative information about unobservable inputs
Servicing rights	$ 109,706	$ 111,690
Level 3 \| Servicing rights \| Multi-family \| Discount Rate \| Minimum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.08	0.08
Level 3 \| Servicing rights \| Multi-family \| Discount Rate \| Maximum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.13	0.13
Level 3 \| Servicing rights \| Multi-family \| Discount Rate \| Weighted average
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.09	0.09
Level 3 \| Servicing rights \| Multi-family \| Constant Prepayment Rate \| Minimum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0	0
Level 3 \| Servicing rights \| Multi-family \| Constant Prepayment Rate \| Maximum
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.39	0.39
Level 3 \| Servicing rights \| Multi-family \| Constant Prepayment Rate \| Weighted average
Quantitative information about unobservable inputs
Servicing asset, measurement input	0.08	0.08
Level 3 \| Collateral-dependent impaired loans \| Measurement Input, Maturity \| Minimum
Quantitative information about unobservable inputs
Marketability discount (as a percent)		0.04
Level 3 \| Collateral-dependent impaired loans \| Measurement Input, Maturity \| Maximum
Quantitative information about unobservable inputs
Marketability discount (as a percent)		0.54
Level 3 \| Collateral-dependent impaired loans \| Measurement Input, Maturity \| Weighted average
Quantitative information about unobservable inputs
Marketability discount (as a percent)		0.05
Level 3 \| Interest rate lock commitments
Quantitative information about unobservable inputs
Derivative assets	$ 218	$ 28
Derivative liabilities	$ 4	$ 23
Level 3 \| Interest rate lock commitments \| Measurement Input, Maturity \| Minimum
Quantitative information about unobservable inputs
Loan closing rates (as a percent)	0.51	0.60
Loan closing rates (as a percent)	0.51	0.60
Level 3 \| Interest rate lock commitments \| Measurement Input, Maturity \| Maximum
Quantitative information about unobservable inputs
Loan closing rates (as a percent)	0.99	0.87
Loan closing rates (as a percent)	0.99	0.87
Level 3 \| Interest rate lock commitments \| Measurement Input, Maturity \| Weighted average
Quantitative information about unobservable inputs
Loan closing rates (as a percent)	0.75	0.77
Loan closing rates (as a percent)	0.75	0.77

The fair value amount of impaired loans.

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Value of input used to measure collateral-dependent impaired loans.

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Value of input used to measure derivative asset.

+ References

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Value of input used to measure derivative liability.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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Value of input used to measure servicing asset.

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