Fair Value Measurements - Range and Weighted Average Pull-Through Rates (Details) - IRLCs - Not Designated as Hedging Instrument	Dec. 31, 2021	Dec. 31, 2020
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	0.42	0.47
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	1	1
Weighted average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	0.85	0.75