Postretirement Benefit Plans - Company's Asset Allocations for its U.S. Pension Plans by Asset Category (Detail) - United States [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Total	$ 178,574	$ 175,336	$ 160,423
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	93,821	124,106
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	84,753	51,230
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	10,918	7,056
Cash and Cash Equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	10,918	7,056
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	62,831	105,898
Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	62,831	105,898
U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	25,083	54,805
U.S. Equities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	25,083	54,805
Non-U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	12,544	23,155
Non-U.S. Equities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	12,544	23,155
Employer Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	25,204	27,938
Employer Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	25,204	27,938
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	104,825	62,382
Fixed Income Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	20,072	11,152
Fixed Income Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	84,753	51,230
U.S. Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	69,073	41,489
U.S. Corporate Bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	69,073	41,489
U.S. Government and Agency Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	22,917	12,722
U.S. Government and Agency Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	20,072	11,152
U.S. Government and Agency Bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	2,845	1,570
Other Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	12,835	8,171
Other Bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	$ 12,835	$ 8,171