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Employee Benefit Plans - Components of Net Periodic Defined Benefit Cost (Income) (Detail) - Defined Benefit Pension Plans - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]      
Interest cost $ 1,483 $ 1,884 $ 1,808
Expected return on plan assets (1,850) (1,899) (3,043)
Recognized actuarial losses 1,412 1,584 1,937
Total $ 1,045 $ 1,569 $ 702