Quarterly report pursuant to Section 13 or 15(d)

Subsequent Event (Notes)

Subsequent Event (Notes)
6 Months Ended
Jun. 30, 2019
Subsequent Events [Abstract]  
Subsequent Events [Text Block] SUBSEQUENT EVENTOn July 24, 2019, the Company announced the closure of its New Boston, Texas biorefinery, REG New Boston, LLC, ("REG New Boston"). REG New Boston's nameplate capacity is 15 mmgy and its closure will reduce the Company's nameplate capacity from 520 mmgy to 505 mmgy. At June 30, 2019, the net book value of REG New Boston's property, plant and equipment was $15,755.