Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Jul. 31, 2012
Deferred tax assets:
Allowance for doubtful accounts	$ 1,109	$ 1,013
Accrued compensation and benefits	29,909	23,902
State taxes	438	625
Accrued other	3,376	2,634
Deferred revenue	675	2,056
Property and equipment	11,651	10,969
Losses carried forward	4,494	1,028
Federal tax benefit	7,897	7,989
Total gross deferred tax assets	59,549	50,216
Less valuation allowance	(1,597)	(1,211)
Net deferred tax assets	57,952	49,005
Deferred tax liabilities:
Vehicle pooling costs	(6,814)	(4,537)
Prepaid insurance	(1,039)	(792)
Deferred revenue
Intangibles and goodwill	(25,757)	(24,758)
Workers compensation	(81)	(224)
Total gross deferred tax liabilities	(33,691)	(30,311)
Net deferred tax asset (liability)	$ 24,261	$ 18,694

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions attributable to Federal tax benefit recognized only for tax purposes and which will reverse when recognized under generally accepted accounting principles.

No definition available.