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Restructuring Charges (Accrued Restructuring Balances) (Details) (USD $)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Restructuring Cost and Reserve [Line Items]    
Additional restructuring charges related to the closure of the Dublin facility during the fourth quarter of 2011  $ 3,400,000 
Balance as of December 31, 2010  4,009,000 
Restructuring Charges145,000452,000625,0002,149,000
Cash Payment  (3,880,000) 
Foreign Exchange Adjustments  167,000 
Balance as of September 30, 2011921,000 921,000 
Severance [Member] | 2011 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring Charges  1,075,000 
Cash Payment  (1,251,000) 
Foreign Exchange Adjustments  9,000 
Balance as of September 30, 2011(167,000) (167,000) 
Severance [Member] | 2010 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance as of December 31, 2010  1,767,000 
Restructuring Charges  (503,000) 
Cash Payment  (1,311,000) 
Foreign Exchange Adjustments  87,000 
Balance as of September 30, 201140,000 40,000 
Lease Facility Costs [Member] | 2009 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance as of December 31, 2010  1,506,000 
Cash Payment  (542,000) 
Foreign Exchange Adjustments  68,000 
Balance as of September 30, 20111,032,000 1,032,000 
Other Exit Costs [Member] | 2010 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance as of December 31, 2010  709,000 
Restructuring Charges  74,000 
Cash Payment  (770,000) 
Foreign Exchange Adjustments  3,000 
Balance as of September 30, 201116,000 16,000 
Other Exit Costs [Member] | 2009 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance as of December 31, 2010  27,000 
Restructuring Charges  (21,000) 
Cash Payment  (6,000) 
2011 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring Charges  1,075,000 
Cash Payment  (1,251,000) 
Foreign Exchange Adjustments  9,000 
Balance as of September 30, 2011(167,000) (167,000) 
2010 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance as of December 31, 2010  2,476,000 
Restructuring Charges  (429,000) 
Cash Payment  (2,081,000) 
Foreign Exchange Adjustments  90,000 
Balance as of September 30, 201156,000 56,000 
2009 [Member]
    
Restructuring Cost and Reserve [Line Items]    
Balance as of December 31, 2010  1,533,000 
Restructuring Charges  (21,000) 
Cash Payment  (548,000) 
Foreign Exchange Adjustments  68,000 
Balance as of September 30, 2011$ 1,032,000 $ 1,032,000