Other Liabilities - Additional information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Liabilities
Deferred revenue	$ 18,972	$ 17,478
Florida Department of Transportation
Other Liabilities
Deferred revenue	$ 12,500	$ 12,500

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.

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