Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015	Feb. 29, 2016
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 8,117		$ 8,117
Goodwill	103,265		103,265		$ 104,349
Finite-Lived Intangible Assets, Gross	108,550		108,550		109,174
Finite-Lived Intangible Assets, Accumulated Amortization	38,197		38,197		32,370
Finite-Lived Intangible Assets, Net	70,353		70,353		76,804
Intangible Assets, Net (Excluding Goodwill)	178,300		178,300		185,022
Depreciation and amortization	2,039	$ 2,044	6,137	$ 4,599
Finite-Lived Intangible Assets, Amortization Expense, Year Two	7,933		7,933
Finite-Lived Intangible Assets, Amortization Expense, Year Three	7,877		7,877
Finite-Lived Intangible Assets, Amortization Expense, Year Four	7,794		7,794
Finite-Lived Intangible Assets, Amortization Expense, Year Five	7,640		7,640
Asset Impairment Charges	0	$ 0	0	$ 6,210
Customer Relationships [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	64,803		64,803		65,290
Finite-Lived Intangible Assets, Accumulated Amortization	26,713		26,713		23,527
Finite-Lived Intangible Assets, Net	38,090		38,090		41,763
Trademarks and Tradenames [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	415		415		415
Finite-Lived Intangible Assets, Accumulated Amortization	393		393		389
Finite-Lived Intangible Assets, Net	22		22		26
Patented Technology [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	31,290		31,290		31,290
Finite-Lived Intangible Assets, Accumulated Amortization	3,401		3,401		1,360
Finite-Lived Intangible Assets, Net	27,889		27,889		29,930
Patents [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	8,501		8,501		8,638
Finite-Lived Intangible Assets, Accumulated Amortization	4,587		4,587		4,079
Finite-Lived Intangible Assets, Net	3,914		3,914		4,559
Licensing Agreements [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,400		1,400		1,400
Finite-Lived Intangible Assets, Accumulated Amortization	1,400		1,400		1,400
Finite-Lived Intangible Assets, Net	0		0		0
Contractual Rights [Member]
Goodwill and Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,141		2,141		2,141
Finite-Lived Intangible Assets, Accumulated Amortization	1,703		1,703		1,615
Finite-Lived Intangible Assets, Net	438		438		526
Trademarks [Member]
Goodwill and Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	107,947		107,947		108,218
Automotive [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	56,732		56,732		57,816
Goodwill, Gross	56,732		56,732
Goodwill, Impaired, Accumulated Impairment Loss	0		0
Goodwill, Other Changes			(1,084)
Premium Audio [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	46,533		46,533		$ 46,533
Goodwill, Gross	78,696		78,696
Goodwill, Impaired, Accumulated Impairment Loss	$ (32,163)		$ (32,163)
Minimum [Member]
Goodwill and Intangible Assets [Line Items]
Fair Value Inputs, Discount Rate		13.10%
Fair Value Inputs, Long-term Revenue Growth Rate		0.70%
Maximum [Member]
Goodwill and Intangible Assets [Line Items]
Fair Value Inputs, Discount Rate		13.80%
Fair Value Inputs, Long-term Revenue Growth Rate		2.90%