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Goodwill and Intangible Assets, Net (Summary of Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |
Accumulated amortization | $ (95,402) | $ (82,856) |
Net carrying amount of finite-lived intangible assets | 53,723 |  |
Intangible assets, gross | 151,829 | 155,556 |
Intangible assets, net | $ 56,427 | 72,700 |
Impairment of discontinued project |  | 0 | $ 0
Weighted average remaining useful life of intangible assets | 6 years 6 months |  |
Capitalized Software [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of finite-lived intangible assets | $ 143,275 | 142,358 |
Accumulated amortization | (90,219) | (74,530) |
Net carrying amount of finite-lived intangible assets | 53,056 | 67,828 |
Patents, Copyrights And Trademarks [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of finite-lived intangible assets | 5,636 | 6,438 |
Accumulated amortization | (4,969) | (5,471) |
Net carrying amount of finite-lived intangible assets | 667 | 967 |
Other [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of finite-lived intangible assets | 214 | 2,855 |
Accumulated amortization | (214) | (2,855) |
Net carrying amount of finite-lived intangible assets | 0 | 0 |
In Progress [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Indefinite-lived intangible assets | 2,378 | 3,616 |
Impairment of discontinued project | 4,754 |  |
Trademarks and Other [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Indefinite-lived intangible assets | $ 326 | $ 289 |
Minimum [Member] | Capitalized Software [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life | 2 years |  |
Minimum [Member] | Patents, Copyrights And Trademarks [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life | 7 years |  |
Maximum [Member] | Capitalized Software [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life | 7 years |  |
Maximum [Member] | Patents, Copyrights And Trademarks [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful life | 25 years |  |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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/presentationRef -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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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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