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Restructuring Schedule of Accrual and Usage of Restructuring Charges (Details) (USD $)
In Thousands, unless otherwise specified
1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Activity of the restructuring accrual          
Beginning balance, January 1, 2013     $ 641    
Restructuring charge 400 4,200 1,843 406 4,886
Non-cash portion of restructuring charge     (781)    
Cash payments     (1,141)    
Ending balance, December 31, 2013 641   562 641  
Restructuring accrual 641   562 641  
Current portion of accrued restructuring     282    
Long-term portion of accrued restructuring     280    
Leases
         
Activity of the restructuring accrual          
Beginning balance, January 1, 2013     517    
Restructuring charge   700 940    
Non-cash portion of restructuring charge     (781)    
Cash payments     (311)    
Ending balance, December 31, 2013     365    
Restructuring accrual     365    
Current portion of accrued restructuring     85    
Long-term portion of accrued restructuring     280    
Severance
         
Activity of the restructuring accrual          
Beginning balance, January 1, 2013     124    
Restructuring charge     903    
Non-cash portion of restructuring charge     0    
Cash payments     (830)    
Ending balance, December 31, 2013     197    
Restructuring accrual     197    
Current portion of accrued restructuring     197    
Long-term portion of accrued restructuring     $ 0