Pensions and Other Post-retirement Benefits - Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12,910	$ 12,094	$ 10,342
Interest cost	11,518	14,905	18,803
Expected return on plan assets	(37,368)	(34,029)	(38,644)
Amortization of transition amounts	0	0	2
Amortization of prior service cost (credit)	164	178	223
Recognized net actuarial losses	17,458	15,799	10,159
Settlement/curtailment (gain) loss	(2,234)	1,135	2,497
Net periodic benefit cost	2,448	10,082	3,382
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	398	396	354
Interest cost	476	716	996
Expected return on plan assets	0	0	0
Amortization of transition amounts	0	0	0
Amortization of prior service cost (credit)	(358)	(394)	(405)
Recognized net actuarial losses	1,597	1,145	869
Settlement/curtailment (gain) loss	0	0	0
Net periodic benefit cost	$ 2,113	$ 1,863	$ 1,814