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Acquisition (Schedule Of Intangible Assets Other Than Goodwill Acquired) (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Aug. 21, 2017 | Dec. 31, 2017
Schedule Of Intangible Assets Other Than Goodwill [Line Items] |  |
Intangibles subject to amortization |  | $ 15,500
Intangibles not subject to amortization |  | $ 18,900
Sierra Bullets, L.L.C [Member] |  |
Schedule Of Intangible Assets Other Than Goodwill [Line Items] |  |
Intangibles subject to amortization, Weighted Average Useful Life | 13 years 9 months 18 days |
Intangible assets acquired | $ 34,400 |
Sierra Bullets, L.L.C [Member] | Trade Names and Trademarks [Member] |  |
Schedule Of Intangible Assets Other Than Goodwill [Line Items] |  |
Intangibles not subject to amortization | 18,900 |
Customer Lists And Relationships [Member] | Sierra Bullets, L.L.C [Member] |  |
Schedule Of Intangible Assets Other Than Goodwill [Line Items] |  |
Intangibles subject to amortization | $ 11,900 |
Intangibles subject to amortization, Weighted Average Useful Life | 15 years |
Product Technologies [Member] | Sierra Bullets, L.L.C [Member] |  |
Schedule Of Intangible Assets Other Than Goodwill [Line Items] |  |
Intangibles subject to amortization | $ 2,500 |
Intangibles subject to amortization, Weighted Average Useful Life | 10 years |
Trade Names and Trademarks [Member] | Sierra Bullets, L.L.C [Member] |  |
Schedule Of Intangible Assets Other Than Goodwill [Line Items] |  |
Intangibles subject to amortization | $ 1,100 |
Intangibles subject to amortization, Weighted Average Useful Life | 10 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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