Quarterly report pursuant to Section 13 or 15(d)

Acquisition (Schedule Of Intangible Assets Other Than Goodwill Acquired) (Details)

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Acquisition (Schedule Of Intangible Assets Other Than Goodwill Acquired) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Aug. 21, 2017
Sep. 30, 2017
Schedule Of Intangible Assets Other Than Goodwill [Line Items]    
Intangibles subject to amortization   $ 15,800
Intangibles subject to amortization, Weighted Average Useful Life 13 years 10 months 24 days  
Intangibles not subject to amortization   $ 18,900
Sierra Bullets, L.L.C [Member]    
Schedule Of Intangible Assets Other Than Goodwill [Line Items]    
Intangibles not subject to amortization $ 18,900  
Intangible assets acquired $ 34,700  
Customer Lists And Relationships [Member]    
Schedule Of Intangible Assets Other Than Goodwill [Line Items]    
Intangibles subject to amortization, Weighted Average Useful Life 15 years  
Customer Lists And Relationships [Member] | Sierra Bullets, L.L.C [Member]    
Schedule Of Intangible Assets Other Than Goodwill [Line Items]    
Intangibles subject to amortization $ 12,200  
Product Technologies [Member]    
Schedule Of Intangible Assets Other Than Goodwill [Line Items]    
Intangibles subject to amortization, Weighted Average Useful Life 10 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  
Tradenames And Trademarks [Member]    
Schedule Of Intangible Assets Other Than Goodwill [Line Items]    
Intangibles subject to amortization, Weighted Average Useful Life 10 years  
Tradenames And Trademarks [Member] | Sierra Bullets, L.L.C [Member]    
Schedule Of Intangible Assets Other Than Goodwill [Line Items]    
Intangibles subject to amortization $ 1,100