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Benefit Plans - Summary of Defined Benefit Plan Weighted Average Assumptions Used In Determining The Benefit Obligation (Detail)	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Discount rate	2.38%	3.25%

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- References

No definition available.

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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