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Revenue Arrangements - Schedule of Changes in Contract Liabilities (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 USD ($)
Contract liabilities: |
Deferred revenue, beginning of period | $ 110,796
Contract liabilities, beginning of period | 110,796
Deferred revenue, additions | 0
Contract liabilities, additions | 0
Deferred revenue, deductions | (2,730)
Contract liabilities, deductions | (2,730)
Deferred revenue, end of period | 108,066
Contract liabilities, end of period | $ 108,066

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044 + Details
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