CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Cash flows from operating activities:
Net income	$ 166,375	$ 151,627	$ 141,103
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations			(2,440)
Depreciation and amortization	45,694	43,242	41,354
Allowance for doubtful accounts	270	442	(174)
Other long-term liabilities	(428)	(440)	(1,171)
Share-based compensation	19,007	17,955	9,413
Excess benefit from share-based compensation	(3,547)	(5,643)	(4,570)
Loss on sale of property and equipment	1,882	659	647
Deferred income taxes	(2,099)	(4,512)	(2,393)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(12,865)	2,436	982
Vehicle pooling costs	13,201	(1,210)	1,361
Inventories	(2,666)	(256)	(54)
Prepaid expenses and other current assets	4,785	(8,896)	1,376
Other assets	739	311	(6,386)
Accounts payable and accrued liabilities	5,614	8,098	(2,479)
Deferred revenue	(5,015)	(2,527)	(1,324)
Income taxes receivable	9,456	861	18,021
Income taxes payable	2,529	(2,740)	10,073
Net cash provided by operating activities	242,932	199,407	203,339
Cash flows from investing activities:
Principal payments from (issuance of) notes receivable		(1,300)	12,000
Purchases of property and equipment	(70,170)	(75,840)	(78,912)
Proceeds from sale of property and equipment	20,602	2,477	7,008
Purchase of assets and liabilities in connection with acquisitions, net of cash acquired	(34,912)	(21,362)
Net cash used in investing activities	(84,480)	(96,025)	(59,904)
Cash flows from financing activities:
Proceeds from the exercise of stock options	7,082	6,285	3,119
Proceeds from the issuance of Employee Stock Purchase Plan shares	1,957	2,044	1,942
Repurchases of common stock	(739,638)	(12,706)	(9,769)
Excess tax benefit from share-based payment compensation	3,547	5,643	4,570
Proceeds from issuance of long-term debt	400,000
Principal payments on long-term debt	(25,000)
Debt offering costs	(2,023)
Change in book overdraft			(17,502)
Net cash provided by (used in) financing activities	(354,075)	1,266	(17,640)
Effect of foreign currency translation	1,444	849	(2,058)
Net increase (decrease) in cash and cash equivalents	(194,179)	105,497	123,737
Cash and cash equivalents at beginning of period	268,188	162,691	38,954
Cash and cash equivalents at end of period	74,009	268,188	162,691
Supplemental disclosure of cash flow information:
Interest paid	3,894	216	353
Cash paid for income taxes	$ 85,145	$ 93,989	$ 71,908