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Losses Due to Repurchases Related to Repurchase Agreements (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2015 | Apr. 30, 2014 | Apr. 30, 2015 | Apr. 30, 2014
Loss Contingencies [Line Items] |  |  |  |
Cost of units repurchased | $ 257 tho_CostOfUnitsRepurchased | $ 598 tho_CostOfUnitsRepurchased | $ 6,484 tho_CostOfUnitsRepurchased | $ 1,047 tho_CostOfUnitsRepurchased
Realization of units resold | 244 tho_RealizationOfUnitsResold | 526 tho_RealizationOfUnitsResold | 5,405 tho_RealizationOfUnitsResold | 916 tho_RealizationOfUnitsResold
Losses due to repurchase | $ 13 tho_LossesDueToRepurchase | $ 72 tho_LossesDueToRepurchase | $ 1,079 tho_LossesDueToRepurchase | $ 131 tho_LossesDueToRepurchase

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- Definition Cost of units repurchased + References No definition available. + Details
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- Definition Losses Due To Repurchase. + References No definition available. + Details
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- Definition Realization of units resold + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Details
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