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Revenue and Related Contract Costs and Contract Liabilities - Narrative (Details) | 9 Months Ended
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Sep. 30, 2018 USD ($)
Disaggregation Of Revenue [Line Items] |
Revenue recognition description of capitalized contract costs | Capitalized contract costs are expensed upon the transfer of the related goods or services and are included in cost of services or cost of products, as applicable
Capitalized contract costs to obtain contracts | $ 1,800,000
Capitalized contract costs to fulfill contracts | 27,400,000
Impairment loss on capitalized contract costs | $ 0
Maximum |
Disaggregation Of Revenue [Line Items] |
Unsatisfied performance obligations period | 1 year
GES |
Disaggregation Of Revenue [Line Items] |
Performance obligation description of payment terms | Payment terms are generally within 30-60 days and contain no significant financing components
GES | Minimum |
Disaggregation Of Revenue [Line Items] |
Performance obligation payment terms | 30 days
GES | Maximum |
Disaggregation Of Revenue [Line Items] |
Performance obligation payment terms | 60 days
Pursuit |
Disaggregation Of Revenue [Line Items] |
Performance obligation description of payment terms | When credit is extended, payment terms are generally within 30 days and contain no significant financing components
Performance obligation payment terms | 30 days

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- Definition Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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- Definition Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130554-203045 + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045 + Details
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