Commitments and Contingencies (Narratives) (Details) - Sep. 30, 2017 BRL in Millions	USD ($)	BRL
Foreign | Secretariat of the Federal Revenue Bureau of Brazil
Loss Contingencies [Line Items]
Value of tax credits disallowed	$ 1,100,000	BRL 3.4
Total amount of claim including accrued interest, penalties and attorneys' fees	8,400,000	26.6
Penalties, court costs, attorneys’ fees, and accrued interest	5,200,000	16.6
Tax liability related to the ICMS Tax Assessments, accrued	3,000,000	BRL 9.4
Inventory Purchase Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	115,100,000
Software and Support Services Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	$ 20,300,000