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Employee Benefit Plans - Information Concerning Defined Benefit Pension Plans (Including Certain Plans for Which ABO Exceeds Fair Value of Plan Assets) (Detail) - Defined Benefit Pension Plans - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
PBO $ 50,367 $ 52,873 $ 50,350
Fair value of plan assets 47,940 50,260 $ 46,313
PBO for plans for which ABO exceeds plan assets 40,254 43,754  
ABO for plans for which ABO exceeds plan assets 40,254 43,754  
Fair value of plan assets for plans for which ABO exceeds plan assets 36,471 37,260  
United States      
Defined Benefit Plan Disclosure [Line Items]      
PBO 40,254 43,754  
Fair value of plan assets 36,471 37,260  
U.K.      
Defined Benefit Plan Disclosure [Line Items]      
PBO 10,113 9,119  
Fair value of plan assets $ 11,469 $ 13,000