Revenue - Additional Information (Details)	6 Months Ended
Jun. 30, 2020 Advertisement
Disaggregation Of Revenue [Line Items]
Advertising agency fee rate based on gross revenue	15.00%
Outdoor Advertising
Disaggregation Of Revenue [Line Items]
Number of advertising business	3,300

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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