Goodwill and Other Intangibles (Tables)

12 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Asset Rollforward

Goodwill and Intangible Asset Rollforward:

			Amortizable Intangibles
	Goodwill (1)		Customer Relationship Intangible			Production and Supply Contract Intangibles			Internally Developed Software Intangible			Total
Weighted average remaining useful life in years as of March 31, 2017			12			4.25			3
March 31, 2015 balance:
Gross carrying amount	$	2,794	$	33,700		$	14,893		$	18,502		$	69,889
Accumulated amortization	—		(16,639		)	(5,786		)	(15,573		)	(37,998		)
Net March 31, 2015 balance	2,794		17,061			9,107			2,929			31,891
Additions (2)	13,669		24,830			—			—			38,499
Amortization expense	—		(1,685		)	(825		)	(846		)	(3,356		)
Net March 31, 2016 balance	16,463		40,206			8,282			2,083			67,034
Additions	—		—			—			79			79
Amortization expense	—		(3,340		)	(432		)	(742		)	(4,514		)
Net March 31, 2017 balance	$	16,463	$	36,866		$	7,850		$	1,420		$	62,599

(1) Goodwill of $2,794 relates to the North America segment and $13,669 relates to the Other Regions segment.

(2) Additions relate to the reconsolidation of MTC. See Note 21 "Reconsolidation of MTC" to the "Notes to Consolidated Financial Statements" for further information.

Estimated Intangible Asset Amortization Expense

The following table summarizes the estimated intangible asset amortization expense for the next five years and beyond:

For Fiscal Years Ended	Customer Relationship Intangible		Production and Supply Contract Intangible		Internally     Developed     Software    Intangible *		Total
2018	$	3,340	$	1,492	$	646	$	5,478
2019	3,340		1,405		427		5,172
2020	3,340		1,397		247		4,984
2021	3,340		1,397		86		4,823
2022	3,340		1,397		14		4,751
Later	20,166		762		—		20,928
	$	36,866	$	7,850	$	1,420	$	46,136

*  Estimated amortization expense for the internally developed software is based on costs accumulated as of March 31, 2017.
    These estimates will change as new costs are incurred and until the software is placed into service in all locations.