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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Valuation and Qualifying Accounts

Schedule II – Valuation and Qualifying Accounts

(in thousands)

 

                                         
          Additions              

Description

   Balance at
Beginning
of Period		     Charged to
Costs and
Expenses		     Charged to
Other
Accounts		     Deductions     Balance at
End of
Period		  

Year Ended December 31, 2009

                                        

Allowance for doubtful accounts

   $ 1,103     $ 268     $ —       $ (706 )    $ 665  

Tax valuation reserve

   $ 296     $ 309     $ —       $ —       $ 605  
           

Year Ended December 31, 2010

                                        

Allowance for doubtful accounts

   $ 665     $ 3,031     $ —       $ (2,386 )    $ 1,310  

Tax valuation reserve

   $ 605     $ (193 )    $ —       $ —       $ 412  
           

Year Ended December 31, 2011

                                        

Allowance for doubtful accounts

   $ 1,310     $ 1,125     $ 213     $ (921 )    $ 1,727  

Tax valuation reserve

   $ 412     $ —       $ —       $ (11 )    $ 401