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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 7 years 6 months |
Intangible Assets | $ 839,211 | $ 848,620
Accumulated Amortization | (446,573) | (437,886)
Intangible Assets, Net | 392,638 | 410,734
Indefinite-lived Intangible Assets [Line Items] |  |
Intangible Assets | 842,211 | 851,620
Intangible Assets, Net | 395,638 | 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 2 months 12 days |
Intangible Assets | $ 527,298 | 532,808
Accumulated Amortization | (223,606) | (213,915)
Intangible Assets, Net | $ 303,692 | 318,893
Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 2 years 6 months |
Intangible Assets | $ 142,144 | 144,704
Accumulated Amortization | (139,330) | (141,580)
Intangible Assets, Net | $ 2,814 | 3,124
Trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 14 years 6 months |
Intangible Assets | $ 92,182 | 93,396
Accumulated Amortization | (27,400) | (26,145)
Intangible Assets, Net | $ 64,782 | 67,251
Non-compete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 3 years 1 month 6 days |
Intangible Assets | $ 43,459 | 43,281
Accumulated Amortization | (33,234) | (32,868)
Intangible Assets, Net | $ 10,225 | 10,413
Patented rights and developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 2 years 1 month 6 days |
Intangible Assets | $ 22,416 | 22,719
Accumulated Amortization | (20,789) | (20,682)
Intangible Assets, Net | $ 1,627 | 2,037
Curriculum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining Weighted Average Amortization Period | 8 years 1 month 6 days |
Intangible Assets | $ 11,712 | 11,712
Accumulated Amortization | (2,214) | (2,696)
Intangible Assets, Net | $ 9,498 | $ 9,016

X
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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