Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 31, 2013	May 31, 2012
Cash flows from operating activities:
Net income	$ 8,855	$ 29,761
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	62,351	61,437
Deferred income taxes	3,530	5,149
Undistributed equity in earnings of joint ventures	(754)	(2,174)
Share-based compensation expense	9,752	7,424
Excess tax benefit from share-based payment arrangements	(198)	(511)
Loss (gain) on disposal of assets	404	(17)
Unrealized foreign exchange loss, net	903	558
Bad debt recoveries, net of expense	(346)	0
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(42,690)	69,037
Inventories	(19,751)	11,104
Income taxes	1,179	(13,729)
Prepaid expenses and other current assets	(13,542)	(3,812)
Intangibles and other long-term assets	637	(263)
Accounts payable	(10,288)	(17,434)
Accrued payroll and related liabilities	1,858	(13,748)
Other accrued liabilities	(1,026)	1,599
Environmental liabilities	(490)	(317)
Other long-term liabilities	(268)	93
Distributed equity in earnings of joint ventures	1,460	2,280
Net cash provided by operating activities	1,576	136,437
Cash flows from investing activities:
Capital expenditures	(66,681)	(54,945)
Joint venture receipts (payments), net	(1,819)	(559)
Proceeds from sale of assets	822	624
Acquisitions, net of cash acquired	(22,677)	0
Purchase of noncontrolling interest	24,734	0
Net cash used in investing activities	(115,089)	(54,880)
Cash flows from financing activities:
Proceeds from line of credit	432,000	372,500
Repayment of line of credit	(432,000)	(372,500)
Borrowings from long-term debt	234,484	380,309
Repayment of long-term debt	(159,028)	(425,755)
Debt financing fees	0	(1,215)
Repurchase of Class A common stock	0	(14,748)
Taxes paid related to net share settlement of share-based payment arrangements	(1,273)	(1,194)
Excess tax benefit from share-based payment arrangements	198	511
Stock options exercised	300	608
Contributions from noncontrolling interest	1,970	2,104
Distributions to noncontrolling interest	(1,743)	(3,497)
Contingent consideration paid related to business acquisitions	0	(4,485)
Dividends paid	(14,885)	(6,520)
Net cash provided by (used in) financing activities	60,023	(73,882)
Effect of exchange rate changes on cash	705	(667)
Net (decrease) increase in cash and cash equivalents	(52,785)	7,008
Cash and cash equivalents as of beginning of period	89,863	49,462
Cash and cash equivalents as of end of period	$ 37,078	$ 56,470