Segment Information (Reconciliation Of Adjusted EBITDA) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA		$ 26,894	$ 31,858	$ 34,420
Stock-based compensation		(3,121)	(2,536)	(3,534)
Reduction (increase) to contingent consideration liability		(1,538)	(35)	1,579
Other expenses		(670)
Impaired assets			(1,302)	(363)
Restructuring costs	$ (400)	(776)	(587)
Depreciation		(3,677)	(4,142)	(3,383)
Amortization		(3,263)	(3,727)	(3,954)
Income from operations		13,849	19,529	24,765
Interest income		325	383	427
Interest expense		(2,263)	(2,137)	(2,237)
Discount on related-party receivables			(363)	(1,196)
Income before income taxes		11,911	17,412	21,759
Provision for income taxes		(4,895)	(6,296)	(3,692)
Net income		7,016	11,116	18,067
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA		34,783	36,948	39,013
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA		$ (7,889)	$ (5,090)	$ (4,593)