Segment Information (Schedule Of Segment Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Segment Reporting Information [Line Items]
Sales to external customers	$ 205,165	$ 190,924	$ 170,456
Gross Profit	138,266	128,989	112,683
Adjusted EBITDA	34,420	31,402	27,056
Depreciation	3,383	3,008	3,142
Amortization	3,954	3,191	2,499
Assets	205,186	189,405	164,080
Capital Expenditures	11,261	4,418	4,730
United States/Canada [Member]
Segment Reporting Information [Line Items]
Sales to external customers	156,537	142,616	125,183
Gross Profit	101,214	91,637	78,618
Adjusted EBITDA	18,990	16,419	15,144
Depreciation	1,704	1,286	1,436
Amortization	3,869	3,180	2,483
Assets	85,847	83,391	74,387
Capital Expenditures	10,008	4,106	3,934
International [Member]
Segment Reporting Information [Line Items]
Sales to external customers	44,701	44,154	42,052
Gross Profit	35,047	35,146	32,616
Adjusted EBITDA	19,888	20,267	16,874
Depreciation	338	327	365
Amortization	85	11	16
Assets	15,220	13,567	12,436
Capital Expenditures	401	146	289
Reportable Unit Assets [Member]
Segment Reporting Information [Line Items]
Sales to external customers	201,238	186,770	167,235
Gross Profit	136,261	126,783	111,234
Adjusted EBITDA	38,878	36,686	32,018
Depreciation	2,042	1,613	1,801
Amortization	3,954	3,191	2,499
Assets	101,067	96,958	86,823
Capital Expenditures	10,409	4,252	4,223
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Sales to external customers	3,927	4,154	3,221
Gross Profit	2,005	2,206	1,449
Adjusted EBITDA	(4,458)	(5,284)	(4,962)
Depreciation	1,341	1,395	1,341
Assets	104,119	92,447	77,257
Capital Expenditures	$ 852	$ 166	$ 507