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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
12 Months Ended
Dec. 31, 2012
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS  
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS
PERIODS ENDED DECEMBER 31, 2012, DECEMBER 31, 2011
AND DECEMBER 31, 2010

COL. A
  COL. B
  COL. C
  COL. D
  COL. E
 
Description
  Balance at
Beginning of Period
  Additions   Deductions   Balance at
End of Period
 

Allowance for doubtful accounts—deducted from receivables from customers and receivable from others

                         

Calendar Year 2012

  $   $   $   $  

Calendar Year 2011

  $   $   $   $  

Calendar Year 2010

  $   $   $   $  

Net deferred tax asset valuation allowance

                         

Calendar Year 2012

  $   $ 33,261,000   $   $ 33,261,000  

Calendar Year 2011

  $   $   $   $  

Calendar Year 2010

  $   $   $   $