Significant Accounting Policies - Derivative Accounting (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Notional derivative contracts	$ 920,617	$ 1,906,092
CME
Derivative Instruments, Gain (Loss) [Line Items]
Notional derivative contracts	$ 850,000
Percent of total notional derivative contracts	92.30%
Amount of variation margin included as settlement	$ (22,000)
LCH
Derivative Instruments, Gain (Loss) [Line Items]
Notional derivative contracts	$ 71,000
Percent of total notional derivative contracts	7.70%
Amount of variation margin included as settlement	$ (1,000)