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Revenue Recognition - Activity of Deferred Contract Costs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Capitalized Contract Cost [Roll Forward] |  |  |  |
Beginning balance | $ 70,742 | $ 59,811 | $ 72,265 | $ 59,434
Capitalization of contract acquisition costs | 8,892 | 8,608 | 15,013 | 15,234
Amortization of deferred contract acquisition costs | (7,866) | (6,553) | (15,510) | (12,802)
Ending balance | $ 71,768 | $ 61,866 | $ 71,768 | $ 61,866

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- Definition Capitalized Contract Cost [Roll Forward] + References No definition available. + Details
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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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