Contingent Liabilities, Commitments and Legal Matters (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023	Jul. 31, 2023
Loss Contingencies [Line Items]
Standby repurchase obligations amount	$ 3,949,915		$ 3,949,915		$ 3,893,048
Term of commitments			18 months
Repurchase and guarantee reserve balances	15,621		$ 15,621		$ 12,114
Losses on repurchase agreements	2,892	$ 0	6,060	$ 0
Selling, General and Administrative Expenses
Loss Contingencies [Line Items]
Gain (loss) related to litigation settlement	$ 4,200	$ 0	$ 14,200	$ 0