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Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 129,573 | $ 128,702
Accumulated Amortization | (52,469) | (49,136)
Net Carrying Amount | 77,104 | 79,566
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Accumulated Amortization | (52,469) | (49,136)
Net Carrying Amount | 77,104 | 79,566
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 20,231 | 19,378
Accumulated Amortization | (5,467) | (5,012)
Net Carrying Amount | 14,764 | 14,366
Distribution agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 8,012 | 8,012
Accumulated Amortization | (6,023) | (5,766)
Net Carrying Amount | 1,989 | 2,246
License agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 26,926 | 26,930
Accumulated Amortization | (7,941) | (7,411)
Net Carrying Amount | 18,985 | 19,519
Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 29,991 | 29,998
Accumulated Amortization | (7,298) | (6,586)
Net Carrying Amount | 22,693 | 23,412
Covenants not to compete |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,028 | 1,028
Accumulated Amortization | (1,008) | (1,000)
Net Carrying Amount | 20 | 28
Customer lists |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 39,965 | 39,936
Accumulated Amortization | (24,732) | (23,361)
Net Carrying Amount | 15,233 | 16,575
In-process technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 3,420 | 3,420
Accumulated Amortization | 0 | 0
Net Carrying Amount | $ 3,420 | $ 3,420

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