Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2021	Feb. 29, 2020
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, gross	$ 27,092	$ 24,765	$ 28,997	$ 30,865
Unrecognized tax benefits that would impact effective tax rate, if recognized	10,600	8,500	7,600
Accrued interest	4,000	3,400	$ 4,700
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	35,184	$ 38,637
Federal tax credit carryforward [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	12,600
State tax credit carryforward [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	12,500
Federal NOL carryforward, no expiration [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	5,700
State NOL carryforward [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,000