Export Sales and Foreign Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Concentration risk
Export sales	$ 30,067	$ 30,582	$ 42,883
Revenue	261,162	281,351	284,188
Property, plant and equipment, net	25,574	29,326
United States
Concentration risk
Revenue	226,690	248,281	244,225
United Kingdom
Concentration risk
Revenue	20,543	17,504	20,598
All other Foreign
Concentration risk
Revenue	13,929	15,566	$ 19,365
Long-lived assets
Concentration risk
Property, plant and equipment, net	25,574	29,326
Goodwill and Intangible assets, less accumulated amortization	123,602	134,690
Long-lived assets \| United States
Concentration risk
Property, plant and equipment, net	22,427	24,993
Goodwill and Intangible assets, less accumulated amortization	117,930	129,057
Long-lived assets \| United Kingdom
Concentration risk
Property, plant and equipment, net	2,320	2,493
Goodwill and Intangible assets, less accumulated amortization	4,403	4,446
Long-lived assets \| All other Foreign
Concentration risk
Property, plant and equipment, net	827	1,840
Goodwill and Intangible assets, less accumulated amortization	$ 1,269	$ 1,187

Represents the amount of revenue earned from export sales during the reporting period.

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Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.

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