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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 7 years 3 months 18 days |
Intangible Assets | $ 846,315 | $ 848,620
Accumulated Amortization | (469,006) | (437,886)
Intangible Assets, Net | 377,309 | 410,734
Indefinite-lived Intangible Assets [Line Items] |  |
Intangible Assets | 849,315 | 851,620
Intangible Assets, Net | 380,309 | 413,734
Engineering license |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Intangible Assets | $ 3,000 | 3,000
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 6 years |
Intangible Assets | $ 531,823 | 532,808
Accumulated Amortization | (240,578) | (213,915)
Intangible Assets, Net | $ 291,245 | 318,893
Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 2 years 3 months 18 days |
Intangible Assets | $ 143,615 | 144,704
Accumulated Amortization | (141,212) | (141,580)
Intangible Assets, Net | $ 2,403 | 3,124
Trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 14 years 3 months 18 days |
Intangible Assets | $ 93,007 | 93,396
Accumulated Amortization | (29,087) | (26,145)
Intangible Assets, Net | $ 63,920 | 67,251
Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 3 years |
Intangible Assets | $ 43,718 | 43,281
Accumulated Amortization | (34,446) | (32,868)
Intangible Assets, Net | $ 9,272 | 10,413
Patented rights and developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 2 years 3 months 18 days |
Intangible Assets | $ 22,440 | 22,719
Accumulated Amortization | (21,173) | (20,682)
Intangible Assets, Net | $ 1,267 | 2,037
Curriculum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 7 years 10 months 24 days |
Intangible Assets | $ 11,712 | 11,712
Accumulated Amortization | (2,510) | (2,696)
Intangible Assets, Net | $ 9,202 | $ 9,016

X
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