Goodwill and Intangible Assets (Tables)

6 Months Ended

Sep. 30, 2017

Finite-Lived Intangible Assets [Line Items]

Schedule of Intangible Assets and Goodwill [Table Text Block]

The following table highlights the Company’s intangible assets (amounts in thousands):

	September 30, 2017				March 31, 2017
	Carrying Amount		Accumulated Amortization		Carrying Amount		Accumulated Amortization
Indefinite Lived Intangible Assets:
Trademarks	$	15,029	$	—	$	7,207	$	—
Amortizing Intangibles:
Purchased technology, customer relationships and patents (2 - 21 years)	69,073		21,730		39,527		16,953
	$	84,102	$	21,730	$	46,734	$	16,953

Schedule of Goodwill [Table Text Block]

The changes in the carrying amount of goodwill for the six-month period ended September 30, 2017 are as follows (amounts in thousands):

	Corporate		Solid Capacitors		Film and Electrolytic
Gross balance as of March 31, 2017
Goodwill	$	4,710	$	35,584	$	1,092
Accumulated impairment losses	—		—		(1,092		)
Net balance as of March 31, 2017	$	4,710	$	35,584	$	—
Goodwill acquired during the year	$	—	$	—	$	—
Impairment charges	$	—	$	—	$	—
Gross balance as of September 30, 2017
Goodwill	$	4,710	$	35,584	$	1,092
Accumulated impairment losses	—		—		(1,092		)
Net balance as of September 30, 2017	$	4,710	$	35,584	$	—