Derivatives - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Aug. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on derivatives and commodity contracts	$ 101,902
Interest Rate Contract | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instrument, amount settled		$ 50
Coal Contract
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain (loss), investment and derivative	(86,252)
Unrealized gain (loss) on derivatives and commodity contracts	$ 101,902