Fair Value Measurements - Summary of Differences Between Fair Value and Principal Value (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Aggregate Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans held for sale in loans held for sale	$ 453,533
Aggregate Unpaid Principal Balance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans held for sale in loans held for sale	441,717
Difference
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage loans held for sale in loans held for sale	$ 11,816