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Pension Plans - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2019 USD ($)
Compensation And Retirement Disclosure [Abstract]
Contribution to pension plan	$ 0
Pension plan contributions to be made during the remainder of 2019	$ 0

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- References

No definition available.

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- Definition

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

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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Amount of contributions expected to be received by defined benefit plan from employer in fiscal year. Excludes contributions paid by employer in current fiscal year.

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-Publisher FASB
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-SubTopic 20
-Section 50
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