Reportable Segments and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 474,669	$ 478,209
Income (loss) before income taxes	78,184	(41,817)
Depreciation and amortization expense, net	13,594	13,540
Cash paid for purchases of property, plant and equipment	9,030	8,235
Goodwill	16,080		$ 16,080
Assets	1,890,339		1,785,349
Intersegment Revenues
Segment Reporting Information [Line Items]
Net revenues	(45,101)	(21,128)
Assets	(386,439)		(421,267)
Biomass-based Diesel
Segment Reporting Information [Line Items]
Net revenues	455,901	395,851
Biomass-based Diesel | Segments
Segment Reporting Information [Line Items]
Net revenues	455,901	395,851
Income (loss) before income taxes	78,633	(40,278)
Depreciation and amortization expense, net	12,038	12,024
Cash paid for purchases of property, plant and equipment	8,608	7,688
Assets	1,820,860		1,711,870
Services
Segment Reporting Information [Line Items]
Net revenues	19,533	19,583
Goodwill	16,080		16,080
Services | Segments
Segment Reporting Information [Line Items]
Net revenues	19,533	19,583
Income (loss) before income taxes	(778)	(869)
Depreciation and amortization expense, net	742	630
Cash paid for purchases of property, plant and equipment	328	547
Assets	54,790		69,144
Corporate and Other
Segment Reporting Information [Line Items]
Net revenues	44,336	83,903
Income (loss) before income taxes	329	(670)
Depreciation and amortization expense, net	814	886
Cash paid for purchases of property, plant and equipment	94	$ 0
Assets	$ 401,128		$ 425,602