Employee Benefit Plans - Components of Net Periodic Defined Benefit Cost (Income) (Detail) - Defined Benefit Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1,884	$ 1,808	$ 2,072
Expected return on plan assets	(1,899)	(3,043)	(2,770)
Amortization of actuarial (gain) loss	1,584	1,937	1,704
Settlement cost			87
Total	$ 1,569	$ 702	$ 1,093