Property, Plant, and Equipment (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018
Land and land improvements	$ 5,105,000	$ 7,031,000
Buildings	39,121,000	42,330,000
Machinery, equipment, and leasehold improvements	230,754,000	275,685,000
Construction in progress	12,242,000	13,461,000
Property, plant, and equipment	287,222,000	338,507,000
Less accumulated depreciation	199,919,000	225,428,000
Net property, plant, and equipment	87,303,000	$ 113,079,000
Capital Leased Assets Buildings Gross	$ 4,838,000

-- None. No documentation exists for this element. --

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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