Summary of Significant Accounting Policies - Derivative Financial Instruments (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) derivative	Mar. 31, 2021 USD ($)	Feb. 28, 2019 USD ($) derivative
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative agreements | derivative			4
Weighted average fixed interest rate on notional amounts			2.48%
Notional amount			$ 400,000,000
Gain (loss) on swaps	$ (11,600,000)	$ (3,200,000)
Power swaps
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative agreements | derivative	2
Gain (loss) on swaps	$ (2,000,000)