Annual report pursuant to Section 13 and 15(d)

LONG-LIVED ASSETS (Investments in nonconsolidated affiliates) (Details)

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LONG-LIVED ASSETS (Investments in nonconsolidated affiliates) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Summarized balance sheet        
Current assets   $ 125,883 $ 58,099  
Noncurrent assets   117,890 14,854  
Current liabilities   133,586 39,207  
Noncurrent Liabilities   15,531 0  
Noncontrolling interests   476 355  
Summarized income statement        
Revenue   83,363 57,620 $ 59,770
Operating income   23,691 24,673 27,443
Net income   18,048 18,652 20,481
Net income attributable to the common stockholders of the equity investees   $ 17,927 18,670 $ 20,400
Impairment charge, investments in nonconsolidated affiliates $ 15,100   $ 16,455  
Venta de Boletos por Computadora S.A. de C.V. [Member]        
Schedule of Equity Method Investments [Line Items]        
Ownership percentage   33.00%