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Acquisition (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2011
Jan. 05, 2012
Cash   $ 19,779
Common Shares (1,940,413 shares)   10,197
Fair value of noncontrolling interest 104,118  
Psteletronicaltda [Member]
   
Fair value of consideration transferred   29,976
Total fair value of PST 104,118  
Gain Recognized On Previously Held Equity Interest 65,372  
Psteletronicaltda [Member] | Noncontrolling Interest [Member]
   
Cash 29,669  
Common Shares (1,940,413 shares) 15,310  
Fair value of consideration transferred 44,979  
Fair value of the Company's previously held equity interest 104,118  
Total fair value of PST 197,824  
Fair value of noncontrolling interest $ 48,727