Fair Value Measurements Notional Amount of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Notional Disclosures [Abstract]
Best efforts contracts and related committed IRLCs	$ 782	$ 2,354
Uncommitted IRLCs	228,831	208,500
FMBSs related to uncommitted IRLCs	223,000	183,000
Best efforts contracts and related mortgage loans held for sale	3,785	78,142
FMBSs related to mortgage loans held for sale	251,000	131,000
Mortgage loans held for sale covered by FMBSs	$ 263,088	$ 148,331