Segment Information - Summary of Revenue by Major Customers (Detail) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	13.10%	15.10%	14.50%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	12.40%	14.40%	14.20%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		14.10%	14.10%
Customer D [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage		11.30%	11.20%
Customer E [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage			11.10%
RNG [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	13.10%
RNG [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	12.40%		14.20%
RNG [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage			14.10%
RNG [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage			11.20%
RNG [Member] | Customer E [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage			11.10%
REG [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage			14.50%