XML 67 R60.htm IDEA: XBRL DOCUMENT v2.4.1.9
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 $ 257tho_CostOfUnitsRepurchased $ 598tho_CostOfUnitsRepurchased $ 6,484tho_CostOfUnitsRepurchased $ 1,047tho_CostOfUnitsRepurchased
Realization of units resold 244tho_RealizationOfUnitsResold 526tho_RealizationOfUnitsResold 5,405tho_RealizationOfUnitsResold 916tho_RealizationOfUnitsResold
Losses due to repurchase $ 13tho_LossesDueToRepurchase $ 72tho_LossesDueToRepurchase $ 1,079tho_LossesDueToRepurchase $ 131tho_LossesDueToRepurchase