Union Contracts (Details)	Jun. 30, 2015 employees
Zanesville Works [Member]
Concentration Risk [Line Items]
Entity Number of Employees	150
Coshocton, OH Works [Member]
Concentration Risk [Line Items]
Entity Number of Employees	340

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
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