Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Debt Instrument [Line Items]
Short-term borrowings	$ 0		$ 0
Australian Credit Facility	8,609		1,298
Short-term borrowings and current portion of long-term debt and other long-term liabilities	8,609	$ 1,105	1,298
Long-term portion:
Financing costs, net (noncurrent)	1,613		1,177
Long-term debt, net	555,964		388,891
Total debt	564,573		390,189
Revolving Credit Facility
Long-term portion:
Long-term debt, net	415,277		280,068
Receivables Securitization Facility
Long-term portion:
Long-term debt, net	$ 142,300		$ 110,000