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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 1,019	$ 315	$ 2,935	$ 1,403
Financing cash flows from finance leases			22,284	10,972
Non-cash right-of-use assets obtained in exchange for lease obligations:
Finance leases			$ 42,842	$ 12,036

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Amount of interest expense on finance lease liability.

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Amount of cash outflow for principal payment on finance lease.

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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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