Export Sales and Foreign Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Concentration risk
Export sales	$ 30,582	$ 42,883	$ 36,719
Revenue	281,351	284,188	252,560
Property, plant and equipment, net	29,326	32,845
United States
Concentration risk
Revenue	248,281	244,225	217,745
United Kingdom
Concentration risk
Revenue	17,504	20,598	16,691
All other Foreign
Concentration risk
Revenue	15,566	19,365	$ 18,124
Long-lived assets
Concentration risk
Property, plant and equipment, net	29,326	32,845
Goodwill and Intangible assets, less accumulated amortization	134,690	150,026
Long-lived assets \| United States
Concentration risk
Property, plant and equipment, net	24,993	28,770
Goodwill and Intangible assets, less accumulated amortization	129,057	143,539
Long-lived assets \| United Kingdom
Concentration risk
Property, plant and equipment, net	2,493	2,911
Goodwill and Intangible assets, less accumulated amortization	4,446	5,239
Long-lived assets \| All other Foreign
Concentration risk
Property, plant and equipment, net	1,840	1,164
Goodwill and Intangible assets, less accumulated amortization	$ 1,187	$ 1,248

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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