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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue from Contract with Customer [Abstract] |
Contract with Customer, Asset and Liability | Contract assets and deferred revenue consisted of the following (in thousands):
| December 31,
| 2019 |  | 2018
Contract assets | $ | 13,969 |  |  | $ | 3,834 |
Deferred revenue | 43,450 |  |  | 46,922 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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