Share-based Compensation - Summary of Restricted and Performance Stock Unit Activity (Details) - $ / shares shares in Thousands	1 Months Ended	3 Months Ended
	Sep. 30, 2023	Mar. 31, 2025
Restricted Share Units
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Unvested balance, beginning balance (in shares)		2,099
Forfeited (in shares)	(100)	(104)
Unvested balance, ending balance (in shares)		1,995
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested balance, Weighted Average Fair Value, beginning balance (in dollars per share)		$ 7.68
Forfeited, Weighted Average Fair Value (in dollars per share)		7.81
Unvested balance, Weighted Average Fair Value, ending balance (in dollars per share)		$ 7.67
Performance restricted share units
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Unvested balance, beginning balance (in shares)		2,785
Forfeited (in shares)		(381)
Unvested balance, ending balance (in shares)		2,404
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested balance, Weighted Average Fair Value, beginning balance (in dollars per share)		$ 4.08
Forfeited, Weighted Average Fair Value (in dollars per share)		4.08
Unvested balance, Weighted Average Fair Value, ending balance (in dollars per share)		$ 4.08

Greenbacker Renewable Energy Co LLC 10-Q