Commitments and Contingencies (Narratives) (Details) - Mar. 31, 2018 R$ in Millions	USD ($)	BRL (R$)
Foreign | Secretariat of the Federal Revenue Bureau of Brazil
Loss Contingencies [Line Items]
Value of tax credits disallowed	$ 1,000,000	R$ 3.4
Penalties, court costs, attorneys’ fees, and accrued interest	5,100,000	16.8
Tax liability related to the ICMS Tax Assessments, accrued	2,800,000	R$ 9.4
Inventory Purchase Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	151,500,000
Software and Support Services Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	$ 17,500,000