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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 1,122	$ 542	$ 1,916	$ 1,088
Financing cash flows from finance leases			13,984	7,985
Non-cash right-of-use assets obtained in exchange for lease obligations:
Finance leases			$ 41,889	$ 4,394

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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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