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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Acquired Finite-Lived Intangible Assets |  |
Finite-Lived Intangible Assets, Gross | $ 83,830 | $ 83,830
Finite-Lived Intangible Assets, Accumulated Amortization | (66,700) | (65,657)
Finite-Lived Intangible Assets, Net | 17,130 | 18,173
Value of Business Acquired |  |
Acquired Finite-Lived Intangible Assets |  |
Finite-Lived Intangible Assets, Gross | 42,788 | 42,788
Finite-Lived Intangible Assets, Accumulated Amortization | (42,788) | (42,788)
Finite-Lived Intangible Assets, Net | 0 | 0
Customer Relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Finite-Lived Intangible Assets, Gross | 34,661 | 34,661
Finite-Lived Intangible Assets, Accumulated Amortization | (19,957) | (19,116)
Finite-Lived Intangible Assets, Net | $ 14,704 | $ 15,545
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 6 years | 6 years 1 month
Trade Names |  |
Acquired Finite-Lived Intangible Assets |  |
Finite-Lived Intangible Assets, Gross | $ 6,381 | $ 6,381
Finite-Lived Intangible Assets, Accumulated Amortization | (3,955) | (3,753)
Finite-Lived Intangible Assets, Net | $ 2,426 | $ 2,628
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 3 years | 3 years 4 months

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