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Income Tax Expense - Schedule of Reconciliation of Tax Expense and Profit Before Tax (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Profit before tax $ 157,697 $ 173,871 $ 171,239
Tax at statutory tax rate of 16.5% 26,020 28,689 28,254
Tax effect of foreign tax jurisdictions 108 34  
Tax effect of two-tiered profit tax rate (21) (21) (21)
Tax effect of non-taxable income (31,954) (15,604) (12,328)
Tax effect of distribution to perpetual securities holders that are deductible for tax purpose (1,412) (2,591) (2,669)
Tax effect of non-deductible expenses 4,743 2,265 202
Tax effect of unrecognized temporary difference   (1) (1)
Overprovision in prior year (800)    
Tax effect of tax loss not recognized 6,637    
Utilization of tax losses previously not recognized   (7) (4)
Withholding tax on the dividend income 993 641 626
Income tax expense $ 4,314 $ 13,405 $ 14,059