Pension Benefit Plan - Summarization of Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Compensation And Retirement Disclosure [Abstract]
Service cost	$ 310	$ 375
Interest cost	108	162
Expected return on plan assets	(410)	(355)
Amortization of actuarial losses	237	203
Net periodic pension cost	$ 245	$ 385