Business Developments - Changes in Accrued Expense (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 0
Charged to earnings	42,657
Charges against assets	(14,009)
Cash payments	(8,853)
Ending balance	19,795
Severance
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charged to earnings	17,860
Charges against assets	0
Cash payments	(185)
Ending balance	17,675
ROU Asset
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charged to earnings	13,000
Charges against assets	(13,000)
Cash payments	0
Ending balance	0
Other
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charged to earnings	11,797
Charges against assets	(1,009)
Cash payments	(8,668)
Ending balance	$ 2,120

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of decrease in the reserve for full or partial settlement through consideration other than cash.

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