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Pension Plans - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021 USD ($)
Compensation And Retirement Disclosure [Abstract]
Contribution to pension plan	$ 0
Pension plan contributions to be made during the remainder of 2021	$ 0

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year.

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