Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Trade Receivables, Net Of Provisions (Components Of Trade Receivables) (Details)

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Trade Receivables, Net Of Provisions (Components Of Trade Receivables) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Trade Receivables, Net Of Provisions [Abstract]        
Trade receivables $ 19,593 $ 51,661    
Allowance for doubtful accounts (3,530) (2,606) (3,392) (11,983)
Trade receivables, net $ 16,063 $ 49,055