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Supplemental Cash Flow Information (Tables)
12 Months Ended
Dec. 31, 2014
Supplemental Cash Flow Information Tables  
Summary Of Cash Paid For Interest And Income Taxes
    For the Years Ended  
    December 31,  
    2014     2013     2012  
Interest   $ 266,581     $ 205,739     $ 191,277  
Income taxes   $ 3,079,602     $ 4,362,991     $ 3,413,687