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13. Commitments (Tables)
3 Months Ended
Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Minimum Rent Obligations
    Minimum   Sublease   Net
Year   Obligation   Rentals   Obligation
  2016     $ 54,876     $ 43,398       11,478  
  2017       46,568       22,263       24,305  
  2018       25,154       —         25,154  
  2019       8,615       —         8,615  
                             
  Total     $ 135,213     $ 65,661     $ 69,552