Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details Textual)

v2.4.0.6
Commitments and Contingencies (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Commitments and Contingencies (Textual) [Abstract]      
Reserve for uncertain taxes $ 1,524    
Number of days in the event within which certain new products are not shipped by a distributor to a customer 90 days    
Accrual related to contingent performance payments for XM-3 and XM-4 27,925    
Additional payments required if XM-4 continues to operate above baseline specifications 10,000    
Period beyond expected operating performance of design life for XM-4 5 years    
Accrual related to contingent performance for FM-5 10,709    
Accrual related to contingent performance for XM-5 21,450    
Operating lease terms one to fifteen years    
Total rent recognized from lease $ 34,143 $ 36,652 $ 44,374
FM-5, XM-5, XM-4 and XM-3 [Member]
     
Commitments and Contingencies (Textual) [Abstract]      
Operating performance over design life 15 years