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Acquisition - Indentifiable Intangible Assets Acquired (Details) - ATS and ATL $ in Thousands	Dec. 07, 2018 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 319,434
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Life in Years	13 years
Finite-lived intangible assets acquired, fair value	$ 188,805
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Life in Years	10 years
Finite-lived intangible assets acquired, fair value	$ 41,780
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets acquired, fair value	$ 88,849

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
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