Derivative Instruments - Gains (Losses) on Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, net	$ 21,200	$ (23,386)	$ (67,749)
Total current period settlements on derivatives	(15,692)	37,729	42,820
Non-trading
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, net	22,130	(23,439)	(67,955)
Total current period settlements on derivatives	(15,752)	37,921	42,944
Trading | Various Acquisitions
Derivative Instruments, Gain (Loss) [Line Items]
Total current period settlements on derivatives	0	300	(900)
Non-cash Flow Hedging | Non-trading
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, net	22,130	(23,439)	(67,955)
Total current period settlements on derivatives	(15,752)	37,921	42,944
Non-cash Flow Hedging | Trading
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives, net	(930)	53	206
Total current period settlements on derivatives	$ 60	$ (192)	$ (124)