Contingent Liabilities and Commitments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified			6 Months Ended
Jan. 31, 2014	Jul. 31, 2013	Jan. 31, 2014 Standby Repurchase Obligations On Dealer Inventory Financing
Loss Contingencies [Line Items]
Standby repurchase obligations amount			$ 1,165,309
Term of commitments			Up to eighteen months
Repurchase and guarantee reserve balances	$ 4,177	$ 3,778

Terms of commitments under repurchase agreements for the repurchase of products sold to dealers.

No definition available.

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