Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 30, 2011	Nov. 30, 2010
Cash flows from operating activities:
Net income	$ 5,499	$ 7,242
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,466	10,300
Stock-based compensation expense	1,122	1,578
Amortization of debt costs to interest expense	679	824
Other	(676)	(641)
Decrease in operating assets:
Restricted cash	2,269	2,136
Accounts receivable and other assets	3,060	3,306
Increase (decrease) in operating liabilities:
Accounts payable	(1,394)	2,361
Accrued and other liabilities	(7,897)	(3,283)
Income taxes	3,294	1,299
Total adjustments	10,923	17,880
Net cash provided by operating activities	16,422	25,122
Cash flows from investing activities:
Purchases of property and equipment	(3,710)	(4,275)
Proceeds from sale of assets	122	1,643
Other	(729)	393
Net cash used in investing activities	(4,317)	(2,239)
Cash flows from financing activities:
Payments on debt	(3,758)	(13,162)
Purchases of treasury stock	(9,852)
Restricted cash for securitization obligations	64	1,637
Other	(990)	(818)
Net cash used in financing activities	(14,536)	(12,343)
Net (decrease) increase in cash and cash equivalents	(2,431)	10,540
Cash and cash equivalents at beginning of period	29,509	86,036
Cash and cash equivalents at end of period	27,078	96,576
Supplemental cash flow information:
Additions to capital lease obligations	1,700
Obligation to acquire treasury stock	$ 599