Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Operating Activities
Cash provided by (used in) operating activities	$ 28,863	$ 3,151
Investing Activities
Capital expenditures	(11,004)	(12,877)
Proceeds from sale of property, plant and equipment	4,636	707
Business acquisitions, net of cash acquired	(15,026)	0
Intercompany Investment		0
Cash used in investing activities	(21,394)	(12,170)
Financing Activities
Purchase of treasury shares	(9,352)	(180,512)
Taxes paid related to the net share settlement of equity awards	(1,332)	(2,325)
Stock option exercises, related tax benefits and other	2,245	4,753
Cash dividend	(2,376)	(2,598)
Intercompany Loan Activity	0	0
Intercompany Capital Contribution		0
Cash (used in) provided by financing activities	(11,025)	16,068
Effect of exchange rate changes on cash	(10,619)	(28,564)
Net decrease in cash and cash equivalents	(14,175)	(21,515)
Cash and cash equivalents – beginning of period	168,846	109,012
Cash and cash equivalents – end of period	154,671	87,497
Line of Credit | Senior Credit Facility - Revolver
Financing Activities
Net borrowings (repayment) on debt	(210)	199,000
Line of Credit | Senior Credit Facility - Term Loan
Financing Activities
Net borrowings (repayment) on debt	0	(2,250)
Taxes paid related to the net share settlement of equity awards	(1,332)
Parent
Operating Activities
Cash provided by (used in) operating activities	(1,458)	20,360
Investing Activities
Capital expenditures	(339)	(519)
Proceeds from sale of property, plant and equipment	13	0
Business acquisitions, net of cash acquired	0
Intercompany Investment		(1,117)
Cash used in investing activities	(326)	(1,636)
Financing Activities
Purchase of treasury shares	(9,352)	(180,512)
Taxes paid related to the net share settlement of equity awards		(2,325)
Stock option exercises, related tax benefits and other	2,245	4,753
Cash dividend	(2,376)	(2,598)
Intercompany Loan Activity	(464)	57,169
Intercompany Capital Contribution		0
Cash (used in) provided by financing activities	(10,351)	(41,101)
Effect of exchange rate changes on cash	0	0
Net decrease in cash and cash equivalents	(12,135)	(22,377)
Cash and cash equivalents – beginning of period	18,688	27,931
Cash and cash equivalents – end of period	6,553	5,554
Parent | Line of Credit | Senior Credit Facility - Revolver
Financing Activities
Net borrowings (repayment) on debt	0	199,000
Parent | Line of Credit | Senior Credit Facility - Term Loan
Financing Activities
Net borrowings (repayment) on debt		(2,250)
Taxes paid related to the net share settlement of equity awards	(1,332)
Guarantors
Operating Activities
Cash provided by (used in) operating activities	(1,222)	(41,149)
Investing Activities
Capital expenditures	(1,869)	(2,447)
Proceeds from sale of property, plant and equipment	2,568	198
Business acquisitions, net of cash acquired	0
Intercompany Investment		0
Cash used in investing activities	699	(2,249)
Financing Activities
Purchase of treasury shares	0	0
Taxes paid related to the net share settlement of equity awards		0
Stock option exercises, related tax benefits and other	0	0
Cash dividend	0	0
Intercompany Loan Activity	0	(42,010)
Intercompany Capital Contribution		0
Cash (used in) provided by financing activities	0	42,010
Effect of exchange rate changes on cash	0	0
Net decrease in cash and cash equivalents	(523)	(1,388)
Cash and cash equivalents – beginning of period	523	3,325
Cash and cash equivalents – end of period	0	1,937
Guarantors | Line of Credit | Senior Credit Facility - Revolver
Financing Activities
Net borrowings (repayment) on debt	0	0
Guarantors | Line of Credit | Senior Credit Facility - Term Loan
Financing Activities
Net borrowings (repayment) on debt		0
Taxes paid related to the net share settlement of equity awards	0
Non-Guarantors
Operating Activities
Cash provided by (used in) operating activities	31,543	23,940
Investing Activities
Capital expenditures	(8,796)	(9,911)
Proceeds from sale of property, plant and equipment	2,055	509
Business acquisitions, net of cash acquired	(15,026)
Intercompany Investment		0
Cash used in investing activities	(21,767)	(9,402)
Financing Activities
Purchase of treasury shares	0	0
Taxes paid related to the net share settlement of equity awards		0
Stock option exercises, related tax benefits and other	0	0
Cash dividend	0	0
Intercompany Loan Activity	464	(15,159)
Intercompany Capital Contribution		1,117
Cash (used in) provided by financing activities	(674)	16,276
Effect of exchange rate changes on cash	(10,619)	(28,564)
Net decrease in cash and cash equivalents	(1,517)	2,250
Cash and cash equivalents – beginning of period	149,635	77,756
Cash and cash equivalents – end of period	148,118	80,006
Non-Guarantors | Line of Credit | Senior Credit Facility - Revolver
Financing Activities
Net borrowings (repayment) on debt	(210)	0
Non-Guarantors | Line of Credit | Senior Credit Facility - Term Loan
Financing Activities
Net borrowings (repayment) on debt		0
Taxes paid related to the net share settlement of equity awards	0
Eliminations
Operating Activities
Cash provided by (used in) operating activities	0	0
Investing Activities
Capital expenditures	0	0
Proceeds from sale of property, plant and equipment	0	0
Business acquisitions, net of cash acquired	0
Intercompany Investment		1,117
Cash used in investing activities	0	1,117
Financing Activities
Purchase of treasury shares	0	0
Taxes paid related to the net share settlement of equity awards		0
Stock option exercises, related tax benefits and other	0	0
Cash dividend	0	0
Intercompany Loan Activity	0	0
Intercompany Capital Contribution		(1,117)
Cash (used in) provided by financing activities	0	(1,117)
Effect of exchange rate changes on cash	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents – beginning of period	0	0
Cash and cash equivalents – end of period	0	0
Eliminations | Line of Credit | Senior Credit Facility - Revolver
Financing Activities
Net borrowings (repayment) on debt	0	0
Eliminations | Line of Credit | Senior Credit Facility - Term Loan
Financing Activities
Net borrowings (repayment) on debt		$ 0
Taxes paid related to the net share settlement of equity awards	$ 0