Annual report pursuant to Section 13 and 15(d)

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

v2.4.1.9
Accounts Receivable, Net (Components of Accounts Receivable) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Receivables [Abstract]    
Trade accounts receivable $ 353,333us-gaap_AccountsReceivableGrossCurrent $ 315,160us-gaap_AccountsReceivableGrossCurrent
Allowance for doubtful accounts (8,943)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent (8,282)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accounts receivable, net $ 344,390us-gaap_AccountsReceivableNetCurrent $ 306,878us-gaap_AccountsReceivableNetCurrent