Accounts and Notes Receivable - Schedule of Accounts and Notes Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Short-term
Accounts and notes receivable	$ 392,114	$ 390,705
Allowance for doubtful accounts	(38,630)	(11,985)
Total net short-term accounts and notes receivable	353,484	378,720
Long-term
Notes receivable	55,906	15,476
Allowance for doubtful accounts	(10,000)	0
Total net long-term notes receivable	45,906	15,476
Total net accounts and notes receivable	$ 399,390	$ 394,196