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Accounts and Notes Receivable (Tables)
6 Months Ended
Jun. 30, 2018
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable
The Company’s accounts and notes receivable balances consisted of the following as of June 30, 2018 and December 31, 2017:

 
June 30, 2018
 
December 31, 2017
 
(in thousands)
Short-term
 
 
 
Accounts and notes receivable
$
393,374

 
$
390,705

Allowance for doubtful accounts
(49,709
)
 
(11,985
)
 
$
343,665

 
$
378,720

Long-term
 
 
 
Notes receivable
$
37,386

 
$
15,476

Total accounts and notes receivable
$
381,051

 
$
394,196