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Contract Assets and Contract Liabilities (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2018 USD ($)
Contract Assets |
Balance at beginning of year | $ 366,168
Recognized in current year | 328,438
Reclassified to accounts receivable | (296,459)
Foreign currency impact | (8,870)
Balance at end of period | 389,277
Contract Liabilities |
Balance at beginning of year | 463,704
Recognized in current year | 151,706
Amounts in beginning balance reclassified to revenue | (142,718)
Current year amounts reclassified to revenue | (17,931)
Foreign currency impact | (14,185)
Balance at end of period | $ 440,576

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 + Details
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