Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									$ 1,975,001	$ 2,015,497
Biomass-based diesel government incentives									666,392	367,490
Total revenues	$ 1,018,169	$ 584,372	$ 560,643	$ 478,209	$ 519,761	$ 596,324	$ 578,900	$ 688,002	2,641,393	2,382,987	$ 2,154,655
Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,714,344	1,790,407
Biomass-based diesel government incentives									666,392	367,490
Total revenues									2,380,736	2,157,897
Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									99,086	93,347
Biomass-based diesel government incentives									0	0
Total revenues									99,086	93,347
Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									270,326	249,152
Biomass-based diesel government incentives									0	0
Total revenues									270,326	249,152	$ 213,500
Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									(108,755)	(117,409)
Biomass-based diesel government incentives									0	0
Total revenues									(108,755)	(117,409)
Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,389,664	1,457,793
Biomass-based Diesel | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,400,973	1,474,459
Biomass-based Diesel | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Biomass-based Diesel | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	9,682
Biomass-based Diesel | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									(11,309)	(26,348)
Petroleum and blended petroleum diesel sales
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									270,326	239,470
Petroleum and blended petroleum diesel sales | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Petroleum and blended petroleum diesel sales | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Petroleum and blended petroleum diesel sales | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									270,326	239,470
Petroleum and blended petroleum diesel sales | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Other biomass-based diesel revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									215,086	178,053
Other biomass-based diesel revenue | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									215,086	178,053
Other biomass-based diesel revenue | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Other biomass-based diesel revenue | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Other biomass-based diesel revenue | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Separated RIN sales
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									98,285	137,895
Separated RIN sales | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									98,285	137,895
Separated RIN sales | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Separated RIN sales | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Separated RIN sales | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Other revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									1,640	2,286
Other revenues | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Other revenues | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									99,086	93,347
Other revenues | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									0	0
Other revenues | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers									$ (97,446)	$ (91,061)