Segment, Major Customer and Major Supplier Information (Details Textual)	3 Months Ended	6 Months Ended
	Sep. 30, 2014 plant country	Sep. 30, 2014 segment plant country
Segment Reporting Information [Line Items]
Number of operating segments		4
Number of operating plants	26	26
Number of plants with recycling operations	11	11
Number of countries Company operates in	11	11
Number of major customers	3
North America [Member]
Segment Reporting Information [Line Items]
Number of operating plants	8	8
Number of fully dedicated recycling facilities	2	2
Number of plants with recycling operations	1	1
Number of countries Company operates in	2	2
Europe [Member]
Segment Reporting Information [Line Items]
Number of operating plants	10	10
Number of fully dedicated recycling facilities	2	2
Number of plants with recycling operations	2	2
Number of countries Company operates in	4	4
Asia [Member]
Segment Reporting Information [Line Items]
Number of operating plants	5	5
Number of fully dedicated recycling facilities	1	1
Number of plants with recycling operations	2	2
Number of countries Company operates in	4	4
South America [Member]
Segment Reporting Information [Line Items]
Number of operating plants	3	3