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15. Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2015
Related Party Transactions Tables  
Amounts due to (due from) related parties
    2015     2014  
Balance, beginning of year   $ 8,357     $ 15,549  
Aircraft rental charges     30,867       30,561  
Payments and advances, net     (6,828 )     (37,753 )
Balance, end of year   $ 32,396     $ 8,357