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ACCOUNTS RECEIVABLE NET (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Accounts Receivable, Net [Abstract]    
Trade receivables $ 63,804 $ 50,876
Unbilled revenue 7,256 12,372
Other receivables 1,973 6,198
Accounts receivable, gross 73,033 69,446
Less: Allowance for doubtful accounts (180) (287)
Accounts receivable, net $ 72,853 $ 69,159