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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Beginning balance at Aug. 31, 2016	$ 20	$ 145,936	$ 289,642	$ (27,298)	$ (267,905)	$ 140,395
Beginning balance, shares at Aug. 31, 2016	19,621,820				5,413,482
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes		(921)				(921)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares	66,418
Stock-based compensation		4,138				4,138
Tax benefits from settlements of stock-based equity awards		1,539				1,539
Cash dividends			(26,808)			(26,808)
Acquisition of treasury stock					$ (31,109)	(31,109)
Acquisition of treasury stock, shares					290,573
Foreign currency translation adjustment				(777)		(777)
Net income			52,930			52,930
Ending balance at Aug. 31, 2017	$ 20	150,692	315,764	(28,075)	$ (299,014)	139,387
Ending balance, shares at Aug. 31, 2017	19,688,238				5,704,055
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes		(1,607)				(1,607)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares	41,536
Stock-based compensation		4,195				4,195
Cash dividends			(29,585)			(29,585)
Acquisition of treasury stock					$ (22,616)	(22,616)
Acquisition of treasury stock, shares					175,306
Foreign currency translation adjustment				439		439
Net income			65,215			65,215
Ending balance at Aug. 31, 2018	$ 20	153,469	351,266	(27,636)	$ (321,630)	$ 155,489
Ending balance, shares at Aug. 31, 2018	19,729,774				5,879,361	13,850,413
Cumulative effect of change in accounting principle		189	(128)			$ 61
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes		(2,783)				(2,783)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares	44,203
Stock-based compensation		4,446				4,446
Cash dividends			(32,889)			(32,889)
Acquisition of treasury stock					$ (29,625)	(29,625)
Acquisition of treasury stock, shares					175,955
Foreign currency translation adjustment				(4,748)		(4,748)
Net income			55,908			55,908
Ending balance at Aug. 31, 2019	$ 20	$ 155,132	374,060	(32,482)	$ (351,255)	$ 145,475
Ending balance, shares at Aug. 31, 2019	19,773,977				6,055,316	13,718,661
Cumulative effect of change in accounting principle			$ (225)	$ (98)		$ (323)

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Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).

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