Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Apr. 30, 2011	Apr. 30, 2010
Cash flows from operating activities:
Net income	$ 125,854	$ 115,394
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	34,363	32,091
Allowance for doubtful accounts	(10)	432
Deferred rent	(346)	(336)
Share-based compensation	14,193	13,300
Excess tax benefits from share-based compensation	(2,925)	(2,966)
Loss on sale and impairment of property and equipment	2,076	2,402
Deferred income taxes	(3,155)	(7,298)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(7,086)	9,196
Vehicle pooling costs	13,934	1,802
Inventory	(919)	164
Prepaid expenses and other current assets	164	(11,551)
Land purchase options and other assets	2,049	171
Accounts payable and accrued liabilities	8,367	17,610
Deferred revenue	(4,459)	(2,348)
Income taxes receivable	9,105	3,747
Income taxes payable	9,445	2,173
Net cash provided by operating activities	200,650	173,983
Cash flows from investing activities:
Capital expenditures	(56,504)	(59,509)
Proceeds from sale of property and equipment	20,385	3,021
Purchase of assets and liabilities in connection with acquisitions, net of cash acquired	(34,582)	(21,366)
Net cash used in investing activities	(70,701)	(77,854)
Cash flows from financing activities:
Proceeds from the exercise of stock options	5,878	4,094
Proceeds from the issuance of Employee Stock Purchase Plan shares	1,077	1,087
Excess tax benefit from share-based payment arrangements	2,925	2,966
Repurchase of common stock	(603,442)	(3,544)
Issuance of long term debt	400,000
Debt offering costs	(2,023)
Principal payments on notes payable	(12,500)
Net cash (used in) provided by financing activities	(208,085)	4,603
Effect of foreign currency translation	2,096	829
Net (decrease) increase in cash and cash equivalents	(76,040)	101,561
Cash and cash equivalents at beginning of period	268,188	162,691
Cash and cash equivalents at end of period	192,148	264,252
Supplemental disclosure of cash flow information:
Interest paid	1,793	201
Income taxes paid	$ 57,440	$ 67,646