Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Trade and other accounts receivable	$ 201,427	$ 211,244
Bank promissory notes	18,563	19,269
Allowance for doubtful accounts	(1,719)	(7,337)
Accounts receivable, net	218,271	223,176
Noncurrent receivables	41,234	$ 45,061
Trade and other accounts receivable noncurrent	$ 5,200
Noncurrent receivables invoice terms	over a 10-year