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Goodwill and Intangible Assets - Carrying Amounts and Useful Lives of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 286,448 | $ 224,393
Accumulated amortization | (117,482) | (98,485)
Foreign currency exchange rate fluctuations | (755) | (1,041)
Net carrying amount | $ 168,211 | 124,867
Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 1 year |
Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 30 years |
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 187,889 | 135,234
Accumulated amortization | (64,254) | (54,860)
Foreign currency exchange rate fluctuations | (777) | (1,058)
Net carrying amount | $ 122,858 | $ 79,316
Customer relationships | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 10 years | 10 years
Customer relationships | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 30 years | 30 years
Acquired technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 86,029 | $ 77,142
Accumulated amortization | (44,851) | (36,194)
Foreign currency exchange rate fluctuations | 6 | 5
Net carrying amount | $ 41,184 | $ 40,953
Acquired technology | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 3 years | 3 years
Acquired technology | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 20 years | 20 years
Backlog |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 1,150 | $ 1,150
Accumulated amortization | (1,078) | (791)
Foreign currency exchange rate fluctuations | 0 | 0
Net carrying amount | $ 72 | $ 359
Useful life | 4 years | 4 years
Trade names |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 7,850 | $ 7,650
Accumulated amortization | (5,794) | (5,037)
Foreign currency exchange rate fluctuations | 14 | 11
Net carrying amount | $ 2,070 | $ 2,624
Trade names | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 1 year | 6 years
Trade names | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 12 years | 12 years
Patents |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 2,930 | $ 3,217
Accumulated amortization | (1,455) | (1,603)
Foreign currency exchange rate fluctuations | 2 | 1
Net carrying amount | $ 1,477 | $ 1,615
Patents | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 2 years | 2 years
Patents | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Useful life | 20 years | 20 years
Non-compete agreements |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 600 |
Accumulated amortization | (50) |
Foreign currency exchange rate fluctuations | 0 |
Net carrying amount | $ 550 |
Useful life | 3 years |

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