Schedule of Aggregate Lease Costs by Lease Classification (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease Cost [Line Items]
Lease payments			$ 205,276	$ 211,940
Equipment \| Utilities and Other
Lease Cost [Line Items]
Short term lease payments	$ 267	$ 452	839	1,808
Real Estate \| Facility Lease Expense
Lease Cost [Line Items]
Variable lease payments	191	18,591	9,146	54,209
Lease payments	$ 335	$ 400	$ 1,122	$ 1,184

Lease cost.

No definition available.

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980

+ Details

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- Definition

Amount of cash outflow for short-term lease payment excluded from lease liability.

+ References

+ Details

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- Definition

Amount of cash outflow for variable lease payment excluded from lease liability.

+ References

+ Details

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