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Income Taxes: (Tables)
6 Months Ended
Jun. 30, 2013
Income Taxes:  
Schedule of income tax benefit of TRSs

  For the Three Months
Ended June 30,
  For the Six Months
Ended June 30,
 
 
  2013   2012   2013   2012  

Current

  $ 125   $   $ (156 ) $  

Deferred

    1,352     3,075     1,877     1,225  
                   

Income tax benefit

  $ 1,477   $ 3,075   $ 1,721   $ 1,225