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Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Dash acquisition and other intangibles: |  |
Accumulated Amortization | $ (16,869) | $ (12,261)
Finite-lived intangible assets, net | 232,040 |
Gross Amount | 249,673 | 260,316
Net Carrying Value | 232,804 | 248,055
Dash |  |
Dash acquisition and other intangibles: |  |
Accumulated Amortization | (9,174) | (9,044)
Gross Amount | 15,093 | 15,093
Net Carrying Value | 5,919 | 6,049
Dash | Licenses |  |
Dash acquisition and other intangibles: |  |
Licenses, indefinite lived | 764 | 764
Dash | Customer relationships |  |
Dash acquisition and other intangibles: |  |
Finite-lived intangible assets, gross | 10,396 | 10,396
Accumulated Amortization | (5,241) | (5,111)
Finite-lived intangible assets, net | $ 5,155 | $ 5,285
Amortization Period | 20 years | 20 years
Dash | Other, definite lived |  |
Dash acquisition and other intangibles: |  |
Finite-lived intangible assets, gross | $ 3,933 | $ 3,933
Accumulated Amortization | (3,933) | (3,933)
Finite-lived intangible assets, net | $ 0 | $ 0
Dash | Other, definite lived | Minimum |  |
Dash acquisition and other intangibles: |  |
Amortization Period | 2 years | 2 years
Dash | Other, definite lived | Maximum |  |
Dash acquisition and other intangibles: |  |
Amortization Period | 7 years | 7 years
Voxbone S.A |  |
Dash acquisition and other intangibles: |  |
Accumulated Amortization | $ (7,695) | $ (3,217)
Gross Amount | 234,580 | 245,223
Net Carrying Value | 226,885 | 242,006
Voxbone S.A | Customer relationships |  |
Dash acquisition and other intangibles: |  |
Finite-lived intangible assets, gross | 149,764 | 156,559
Accumulated Amortization | (4,161) | (1,739)
Finite-lived intangible assets, net | $ 145,603 | $ 154,820
Amortization Period | 15 years | 15 years
Voxbone S.A | Developed technology |  |
Dash acquisition and other intangibles: |  |
Finite-lived intangible assets, gross | $ 84,816 | $ 88,664
Accumulated Amortization | (3,534) | (1,478)
Finite-lived intangible assets, net | $ 81,282 | $ 87,186
Amortization Period | 10 years | 10 years

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