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Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Unrecognized Tax Benefits
Total unrecognized tax benefits, beginning balance	$ 6,611	$ 8,737
Resolution of tax dispute	(1,486)
Changes in tax positions taken during a prior period	88
Changes in tax positions taken during a prior period		(1,260)
Changes due to lapse in statute of limitations	(890)	(218)
Impact of foreign currency remeasurement on unrecognized tax benefits in the current period		(133)
Impact of foreign currency remeasurement on unrecognized tax benefits in the current period	218
Settlements	(113)	(515)
Total unrecognized tax benefits, ending balance	4,428	6,611	$ 8,737
Less current unrecognized tax benefits	(1,079)
Noncurrent unrecognized tax benefits	3,349	6,611
Unrecognized tax benefits that would affect effective tax rate if recognized	4,400
Liability for tax-related interest and penalties included in unrecognized tax benefits	1,100	1,700
Tax-related interest and penalties expense included in provisions for income tax	$ (500)	$ (600)	$ 500

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Amount recognized for uncertainty in income taxes classified as current.

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Amount recognized for uncertainty in income taxes classified as noncurrent.

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