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, 2012
Dec. 31, 2011
Accounts receivable, net    
Gross accounts receivable $ 117,853 $ 111,637
Allowance for doubtful accounts (11,711) (9,932)
Total accounts receivable, net $ 106,142 $ 101,705