Annual report pursuant to Section 13 and 15(d)

Accounts Receivable, Net (Components of Accounts Receivable) (Details)

v3.3.1.900
Accounts Receivable, Net (Components of Accounts Receivable) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Trade accounts receivable $ 381,881 $ 353,333
Allowance for doubtful accounts (9,928) (8,943)
Accounts receivable, net $ 371,953 $ 344,390