Impairments and Other (Gains) Charges (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Property, Plant and Equipment [Abstract]
Lease impairment		$ 14,200
Leasehold improvement impairment		14,300
Employee severance cost		$ 1,300
Lease termination gains	$ 6,800		$ 0	$ 6,792

Amount of gain (loss) on termination of lease before expiration of lease term.

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Amount of loss from impairment of right-of-use asset from operating lease.

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No definition available.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

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