Description of Business and Summary of Significant Accounting Policies Intangible Assets Table (Details) - USD ($) $ in Thousands	Feb. 28, 2019	Feb. 28, 2018
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 90,449	$ 88,325
Finite-Lived Intangible Assets, Accumulated Amortization	45,955	39,396
Finite-Lived Intangible Assets, Net	44,494	48,929
Indefinite-lived Intangible Assets (Excluding Goodwill)	34,662
Intangible assets, net	119,449	150,320
Customer Relationships [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	49,743	50,249
Finite-Lived Intangible Assets, Accumulated Amortization	29,746	26,807
Finite-Lived Intangible Assets, Net	19,997	23,442
Trademarks and Tradenames [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	485	415
Finite-Lived Intangible Assets, Accumulated Amortization	413	400
Finite-Lived Intangible Assets, Net	72	15
Patented Technology [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	31,290	31,290
Finite-Lived Intangible Assets, Accumulated Amortization	9,523	6,802
Finite-Lived Intangible Assets, Net	21,767	24,488
Patents [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	5,390	2,830
Finite-Lived Intangible Assets, Accumulated Amortization	2,907	2,138
Finite-Lived Intangible Assets, Net	2,483	692
Licensing Agreements [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,400	1,400
Finite-Lived Intangible Assets, Accumulated Amortization	1,400	1,400
Finite-Lived Intangible Assets, Net	0	0
Contractual Rights [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,141	2,141
Finite-Lived Intangible Assets, Accumulated Amortization	1,966	1,849
Finite-Lived Intangible Assets, Net	175	292
Trademarks [Member]
Goodwill and Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 74,955	$ 101,391