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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Prepaid Expense And Other Assets Current [Abstract]    
Prepaid tolls $ 7,947 $ 10,116
Deposits 3,345 3,642
Prepaid services 3,176 5,201
Prepaid computer maintenance 2,559 2,923
Prepaid insurance 841 1,485
Photo enforcement equipment held for sale 416 1,410
Prepaid income taxes 230 1,025
Other 450 689
Total prepaid expenses and other current assets $ 18,964 $ 26,491