Warranties (Schedule of Product Warranty Liability) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Product Warranties Disclosures [Abstract]
Product warranty accrual balance, beginning of period	$ 7,240	$ 8,187	$ 7,109	$ 8,411
Liabilities accrued for warranties during the period	1,652	647	2,830	2,103
Warranty claims paid during the period	(1,259)	(1,245)	(2,306)	(2,933)
Changes in estimates	338	(41)	338	(33)
Product warranty accrual balance, end of period	$ 7,971	$ 7,548	$ 7,971	$ 7,548

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(1)
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-Section 50
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- Definition

Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(2))
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Amount of increase (decrease) in the standard and extended product warranty liability.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
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Amount of increase in the standard and extended product warranty accrual from warranties issued.

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