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Restructuring Costs and Other Net (Details) (USD $)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
years
productcandidate
workforcereduction
product
segment
Sep. 30, 2010
Restructuring Cost and Reserve [Line Items]    
Restructuring charges$ 2,100,000$ (200,000)$ 2,000,000$ 6,900,000
Restructuring and Related Cost, Number of Workforce Reduction  2 
Employee serverance and other personnel benefits:    
Restructuring Reserve, Beginning of Period  144,000 
Restructuring Reserve, Period Expense  1,952,000 
Restructuring Reserve, Settled with Cash  (25,000) 
Restructuring Reserve, Settled without Cash  (304,000) 
Restructuring Reserve, End of Period1,767,000 1,767,000 
Restrucruting and Related Cost Expected Cost Remainder of Year  1,000,000 
Restrucruting and Related Cost Expected Cost Year One  800,000 
Restructuring and Related Costs, Favorable Adjustment Due to Reversal of Costs  (100,000) 
Leipzig Closure 2011 [Member]
    
Employee serverance and other personnel benefits:    
Restructuring Reserve, Beginning of Period  0 
Restructuring Reserve, Period Expense  849,000 
Restructuring Reserve, Settled with Cash  0 
Restructuring Reserve, Settled without Cash  0 
Restructuring Reserve, End of Period849,000 849,000 
2010 Workforce Reductions [Member]
    
Employee serverance and other personnel benefits:    
Restructuring Reserve, Beginning of Period  134,000 
Restructuring Reserve, Period Expense  (119,000) 
Restructuring Reserve, Settled with Cash  (15,000) 
Restructuring Reserve, Settled without Cash  0 
Restructuring Reserve, End of Period0 0 
Leases and Equipment Write-Offs [Member]
    
Employee serverance and other personnel benefits:    
Restructuring Reserve, Beginning of Period  10,000 
Restructuring Reserve, Period Expense  304,000 
Restructuring Reserve, Settled with Cash  (10,000) 
Restructuring Reserve, Settled without Cash  (304,000) 
Restructuring Reserve, End of Period0 0 
Other Associated Costs [Member]
    
Employee serverance and other personnel benefits:    
Restructuring Reserve, Beginning of Period  0 
Restructuring Reserve, Period Expense  918,000 
Restructuring Reserve, Settled with Cash  0 
Restructuring Reserve, Settled without Cash  0 
Restructuring Reserve, End of Period$ 918,000 $ 918,000 
Office Based Personnel [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring and Related Cost, Number of Positions Eliminated  30 
Field Based Personnel [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring and Related Cost, Number of Positions Eliminated  42