Leases and Other - Components of Least Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Finance lease cost:
Amortization of ROU assets	$ 1,093	$ 926	$ 3,231	$ 2,767
Interest on lease liabilities	1,405	429	4,193	1,258
Operating lease cost	5,165	6,596	17,328	20,235
Short-term lease cost	394	123	853	465
Variable lease cost	1,059	1,557	3,093	4,615
Total lease cost, net	$ 9,116	$ 9,631	$ 28,698	$ 29,340

Amount of interest expense on finance lease liability.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of amortization expense attributable to right-of-use asset from finance lease.

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- Definition

Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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