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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 31, 2014 Y director	Jul. 31, 2013	Jul. 31, 2012
BCRC [Member]
Right to appoint the number of directors	4
Number of directors	9
Management agreement renewable period, years	1
Management fees and reimbursement of operating expenses	$ 7.0	$ 7.0	$ 6.9
SSF/VARE [Member]
Ownership interest	50.00%
Real estate commission expense	0	0.3	0.9
Real estate revenue from leases	$ 0.5	$ 0.5	$ 0.4

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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