General (Details) T in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020 Cokemaking_facility T	Dec. 31, 2021 T
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Coke production experience	55 years
Number of facilities (in cokemaking facilities) | Cokemaking_facility	5
Period of existence	30 years
Forecast
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Coke making capacity (in tons)		100
United States
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Coke making capacity (in tons)	4,200
Brazil
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Number of facilities (in cokemaking facilities) | Cokemaking_facility	1
Coke making capacity (in tons)	1,700
Convent, Louisiana, East Chicago, Indiana, West Virginia
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Coal handling capacity (in tons)	40,000
Coal storage capacity (in tons)	3,000