Annual report pursuant to Section 13 and 15(d)

Accounts Receivable, net (Details)

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Accounts Receivable, net (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Accounts receivable, net    
Gross accounts receivable $ 111,637 $ 131,880
Allowance for doubtful accounts (9,932) (10,222)
Total accounts receivable, net $ 101,705 $ 121,658