Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Mortgage servicing rights	$ 850	$ 749
Level 3
Fair Value Measurements
Percentage of level three assets to total assets measured at fair value	1.00%	83.00%
Percentage of level three liabilities to total liabilities measured at fair value	40.00%	84.00%
Recurring basis | Level 2
Assets
Mortgage loans held for-for-sale	$ 37,035	$ 308,477
Derivatives assets, lending, net	12
Total assets at fair value	37,047	308,477
Liabilities
Derivative liabilities, lending, net	12	55
Total liabilities at fair value	12	55
Recurring basis | Level 3
Assets
Derivatives assets, lending, net	498	3,111
Mortgage servicing rights	850	749
Securitized mortgage collateral		1,639,251
Total assets at fair value	1,348	1,643,111
Liabilities
Securitized mortgage borrowings		1,614,862
Long-term debt	35,889	46,536
Total liabilities at fair value	35,889	1,661,398
Recurring basis | Interest rate lock commitments (IRLCs) | Level 3
Assets
Derivatives assets, lending, net	498	$ 3,100
Recurring basis | Hedging Instruments | Level 2
Assets
Derivatives assets, lending, net	$ 12