Description of Business and Basis of Presentation (Details) MT in Thousands, $ in Thousands	Jul. 31, 2020 USD ($) MT	Jul. 01, 2020 USD ($) MT	Jan. 02, 2020 USD ($)	Jun. 28, 2019 USD ($)	Apr. 02, 2019 USD ($) T	Sep. 30, 2020 plant
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of industrial-scale production wood pellet production plants in operation | plant						9
Hamlet Transaction
Business Acquisition [Line Items]
Purchase price			$ 40,000	$ 50,000	$ 24,700
Total consideration					$ 165,000
Greenwood, SC | Greenwood Drop-Down
Business Acquisition [Line Items]
Purchase price		$ 129,700
Total consideration		$ 132,000
Take-or-pay off-take contract volume (MTPY) | MT		1,400
Greenwood, SC | Make-Whole agreement | Greenwood Drop-Down
Business Acquisition [Line Items]
Construction cost incurred		$ 28,000
Greenwood, SC | Third EVA MSA Fee Waiver | Greenwood Drop-Down
Business Acquisition [Line Items]
Fee waived		$ 37,000
Plant Production Volumes (MT) | MT		50
Waycross, GA | Georgia Biomass Holding LLC
Business Acquisition [Line Items]
Purchase price	$ 175,000
Take-or-pay off-take contract volume (MTPY) | MT	500
Plant Production Capacity (MTPY) | MT	800
Savannah, GA | Georgia Biomass Holding LLC
Business Acquisition [Line Items]
Wood Pellet Storage Capacity (MT) | MT	50
Hamlet, NC | Hamlet JV | Hamlet Transaction
Business Acquisition [Line Items]
Take-or-pay off-take contract volume (MTPY) | T					1,000,000.0