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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2017
Summary of Significant Accounting Policies [Abstract]  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Computer software3 to 15
Land rights50 to 143
Naming rights1 to 24
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]