Income Taxes Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Feb. 28, 2017	Feb. 28, 2019	Feb. 28, 2018	Feb. 29, 2016
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		$ 7,959
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ (98)	(389)	$ (145)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		1,332	602
Unrecognized Tax Benefits	10,844	9,082	9,107	$ 14,472
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	3,147	2,125	630
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	0	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(6,470)	(1,923)	(2,945)
Unrecognized Tax Benefits, Period Increase (Decrease)	$ (305)	(227)	$ 578
Settlement with Taxing Authority [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		9,082
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		$ 210

Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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