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Goodwill and Intangible Assets (Finite-Lived and Indefinite-Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Accumulated amortization $ (169,109) $ (199,853)
Intangible Assets Total, Gross carrying amount 528,157 642,917
Intangible Assets Total, Net amortizable intangibles 359,048 443,064
Customer relationships    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Gross carrying amount 337,546 428,544
Accumulated amortization (110,228) (138,566)
Net amortizable intangibles 227,318 289,978
Patents and technology    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Gross carrying amount 104,394 110,910
Accumulated amortization (17,148) (16,733)
Net amortizable intangibles 87,246 94,177
Non-compete agreements    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Gross carrying amount 6,245 6,625
Accumulated amortization (5,600) (6,041)
Net amortizable intangibles 645 584
Trade names    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Gross carrying amount 47,493 64,359
Accumulated amortization (18,107) (22,090)
Net amortizable intangibles 29,386 42,269
Distributor relationships    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Gross carrying amount 22,160 22,160
Accumulated amortization (17,602) (16,338)
Net amortizable intangibles 4,558 5,822
Trademarks    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Gross carrying amount 10,319 10,319
Accumulated amortization (424) (85)
Net amortizable intangibles $ 9,895 $ 10,234
Maximum    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 17 years  
Maximum | Customer relationships    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 15 years 15 years
Maximum | Patents and technology    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 17 years 17 years
Maximum | Non-compete agreements    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 6 years 6 years
Maximum | Trade names    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 15 years 15 years
Maximum | Distributor relationships    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 15 years 15 years
Minimum    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 3 years  
Minimum | Customer relationships    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 4 years 4 years
Minimum | Patents and technology    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 5 years 5 years
Minimum | Non-compete agreements    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 3 years 3 years
Minimum | Trade names    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 10 years 10 years
Minimum | Distributor relationships    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 8 years 8 years
Minimum | Trademarks    
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]    
Estimated useful life, intangible assets 15 years 15 years