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Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 97,680 | $ 77,387
Accumulated Amortization | (38,127) | (30,048)
Net Carrying Amount | 59,553 | 47,339
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 16,528 | 14,130
Accumulated Amortization | (3,737) | (3,165)
Net Carrying Amount | 12,791 | 10,965
Distribution agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 7,262 | 6,626
Accumulated Amortization | (4,686) | (3,527)
Net Carrying Amount | 2,576 | 3,099
License agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 23,783 | 20,695
Accumulated Amortization | (5,568) | (3,422)
Net Carrying Amount | 18,215 | 17,273
Trademarks |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 16,224 | 12,380
Accumulated Amortization | (4,686) | (3,330)
Net Carrying Amount | 11,538 | 9,050
Covenants not to compete |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,028 | 1,028
Accumulated Amortization | (968) | (936)
Net Carrying Amount | 60 | 92
Customer lists |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 31,935 | 22,261
Accumulated Amortization | (18,482) | (15,401)
Net Carrying Amount | 13,453 | 6,860
In-process technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 920 |
Accumulated Amortization | 0 |
Net Carrying Amount | $ 920 |
Royalty agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount |  | 267
Accumulated Amortization |  | (267)
Net Carrying Amount |  | $ 0

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