Income Taxes Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 8,103
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	98	$ 23	$ (166)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	3,194	648
Unrecognized Tax Benefits	10,844	14,472	14,575	$ 14,565
Unrecognized Tax Benefits, Increases Resulting from Current and Prior Period Tax Positions	3,147	1,366	7,538
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	0	(142)
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(6,470)	(915)
Unrecognized Tax Benefit, Other Increase (Decrease)	(305)	$ (554)	$ (824)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	10,844
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	746
Unrecognized Tax Benefits	$ 2,932