Product Warranties - Activity in Accrued Warranty Costs Liability (Details) - Warranty Reserves [Member] - USD ($) $ in Thousands	6 Months Ended
Aug. 31, 2018	Aug. 31, 2017
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 5,734	$ 6,518
Charged to costs and expenses	558	688
Deductions	(722)	(1,158)
Balance at end of period	$ 5,570	$ 6,048

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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

+ Details

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- Definition

Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

+ References

+ Details

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- Definition

Amount of decrease in valuation and qualifying accounts and reserves.

+ References

+ Details

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