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Commitments and Contingencies Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Commitments And Contingencies Disclosure [Line Items] |  |  |
Accrual for Environmental Loss Contingencies | $ 1,200 |  |
Total rental expense | 2,000 | $ 1,800 | $ 2,200
Total future minimum operating lease payments | 14,084 |  |
Operating Leases, Future Minimum Payments Receivable | 700 |  |
Property, plant and equipment, gross | 83,364 | 82,532 |
Accumulated depreciation and amortization | $ 47,877 | 40,944 |
EnvironmentalMonitoringPeriod | 10 years |  |
Environmental Remediation Expense | $ 931 | 340 | $ 0
Total future minimum lease payments of McCook facility | 8,859 |  |
Proposed income tax adjustment | 800 | 1,300 |
Headquarters |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Total future minimum operating lease payments | 8,500 |  |
McCook facility |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Property, plant and equipment, gross | 12,961 | 12,961 |
Accumulated depreciation and amortization |  | 4,600 |
Capital leases |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Property, plant and equipment, gross | 563 | 302 |
Accumulated depreciation and amortization |  | $ 300 |
Capitalizable [Domain] |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Environmental Exit Costs, Anticipated Cost | 300 |  |
Minimum |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Environmental Exit Costs, Anticipated Cost | 300 |  |
Maximum |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Environmental Exit Costs, Anticipated Cost | $ 1,400 |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
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- Definition Total anticipated costs associated with remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal, or abandonment of a particular property resulting from unanticipated contamination of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q4) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 4 + Details
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