Debt - Schedule of Debt (Details) BRL in Millions	12 Months Ended
	Dec. 31, 2015 BRL	Dec. 31, 2015 USD ($)	Jul. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Short-term borrowings
Short-term debt		$ 400,000		$ 2,300,000
Long-term debt
Long-term debt		282,400,000		175,700,000
Less: current portion		(1,800,000)		(1,900,000)
Long-term debt, less current portion		280,600,000		173,800,000
Foreign credit facilities | Foreign Line of Credit
Short-term borrowings
Short-term debt		0		2,300,000
Senior unsecured notes
Long-term debt
Long-term debt		$ 0		75,000,000
Senior unsecured notes | Senior Notes
Long-term debt
Interest Rate at December 31, 2015	0.00%	0.00%
Maturity Date	Jul. 31, 2015
Long-term debt		$ 0	$ 75,000,000	75,000,000
Brazilian Real Loan
Long-term debt
Long-term debt		$ 300,000		2,000,000
Brazilian Real Loan | Secured Debt
Long-term debt
Interest Rate at December 31, 2015	5.50%	5.50%
Maturity Date	Apr. 15, 2016
Long-term debt	BRL 1.3	$ 300,000		2,000,000
Brazilian Real Loan
Long-term debt
Long-term debt		$ 2,700,000		4,300,000
Brazilian Real Loan | Secured Debt
Long-term debt
Interest Rate at December 31, 2015	8.00%	8.00%
Maturity Date	Oct. 16, 2017
Long-term debt	BRL 10.6	$ 2,700,000		4,300,000
Other
Short-term borrowings
Interest Rate at December 31, 2015	2.50%	2.50%
Other | Loans Payable
Long-term debt
Long-term debt		$ 0		100,000
Other | Loans Payable
Short-term borrowings
Short-term debt		400,000		0
Revolving Credit Facility | Line of Credit
Long-term debt
Long-term debt		$ 279,400,000
Revolving Credit Facility | Revolving credit facility | Line of Credit
Long-term debt
Interest Rate at December 31, 2015	1.90%	1.90%
Maturity Date	Feb. 10, 2020
Long-term debt		$ 279,400,000		$ 94,300,000