Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Schedule of Gross Accounts Receivable Balance Concentrations by Major Category (Details)

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Summary of Significant Accounting Policies - Schedule of Gross Accounts Receivable Balance Concentrations by Major Category (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 39,062 $ 34,710
Gross accounts receivable, percentage 100.00% 100.00%
Rental    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 3,406 $ 6,236
Gross accounts receivable, percentage 8.70% 18.00%
Business To Business And Other Receivables    
Accounts Notes And Loans Receivable [Line Items]    
Gross accounts receivable $ 35,656 $ 28,474
Gross accounts receivable, percentage 91.30% 82.00%