Commitments and Contingencies - Mortgage Commitments (Details) - Mortgage Commitments - USD ($) $ in Thousands	Apr. 30, 2025	Oct. 31, 2024
Aggregate mortgage loan commitments:
Total	$ 1,947,985	$ 1,837,284
Investor commitments to purchase:
Total	497,398	351,663
IRLCs
Aggregate mortgage loan commitments:
Total	310,413	168,829
Investor commitments to purchase:
Total	310,413	168,829
Non-IRLCs
Aggregate mortgage loan commitments:
Total	1,637,572	1,668,455
Mortgage loans held for sale
Investor commitments to purchase:
Total	$ 186,985	$ 182,834