XML 82 R59.htm IDEA: XBRL DOCUMENT v3.3.1.900
Accounts Receivable, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivables, net $ 246,191 $ 390,977
Unbilled receivables 40,033 62,993
Taxes Receivable 34,163 32,056
Affiliated 3,966 3,370
Other receivables 1,773 1,418
Trade accounts receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivables, net 166,256 291,140
Allowance for doubtful accounts $ 2,528 $ 2,477