Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Cash flows from operating activities:
Net income	$ 23,277	$ 17,747
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	22,056	23,199
Stock-based compensation expense	1,919	1,785
Other	(3,408)	(775)
Decrease in operating assets:
Restricted cash	4,787	5,884
Accounts receivable and other assets	2,514	7,776
Increase (decrease) in operating liabilities:
Accounts payable	1,464	(411)
Accrued and other liabilities	(9,932)	(4,748)
Income taxes	(3,919)	6,326
Total adjustments	15,481	39,036
Net cash provided by operating activities	38,758	56,783
Cash flows from investing activities:
Purchases of property and equipment	(17,808)	(23,351)
Proceeds from sale of assets	9,490	2,332
Other	3,201	3,088
Net cash used in investing activities	(5,117)	(17,931)
Cash flows from financing activities:
Payments on debt	(59,397)	(4,895)
Proceeds from borrowings	116,000	48,500
Purchases of treasury stock	(74,326)	(95,597)
Proceeds from exercise of stock options	3,754	14,323
Payment of dividends	(10,852)	(9,469)
Other	95	(176)
Net cash used in financing activities	(24,726)	(47,314)
Net increase (decrease) in cash and cash equivalents	8,915	(8,462)
Cash and cash equivalents at beginning of period	27,191	35,694
Cash and cash equivalents at end of period	36,106	27,232
Cash paid during the period for:
Income taxes (net of refunds)	14,645	1,708
Non-cash investing and financing activities:
Change in obligation to acquire treasury stock	$ (2,632)	$ (259)