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Insurance Recovery and Gains (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Business Interruption Loss [Line Items]
Property and equipment	$ 226,693,000		$ 233,667,000
Gain on insurance recovery	1,531,000	$ 2,460,000
Lubbock, Texas Interruption Loss [Member]
Business Interruption Loss [Line Items]
Property and equipment				$ 0
Insurance proceeds for building and inventory destroyed		4,600,000
Gain on insurance recovery		$ 2,500,000
Lubbock, Texas Interruption Loss [Member] | Building [Member] | Business Interruption and Other Expenses [Member]
Business Interruption Loss [Line Items]
Gain on insurance recovery	1,400,000
Wichita, Kansas [Member]
Business Interruption Loss [Line Items]
Insurance proceeds for inventory destroyed and other expenses	$ 400,000

X

- Definition

The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement for building and inventory destroyed.

+ References

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The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement for inventory destroyed and other expenses.

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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.

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- Definition

The net amount (to the extent disclosed within this portion of the income statement) by which an insurance settlement exceeds incremental costs incurred from the event causing an interruption of business, plus the insurance award for earnings lost from the event, such as a natural catastrophe, explosion or fire.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64839914&loc=d3e16285-107787

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02(14))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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