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Components of Income Tax Expense (Benefit) (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Deferred income tax expense (benefit):    
U.S. Federal $ 573 $ (3,413)
Total deferred income tax expense (benefit) 573 (3,413)
Total income tax expense (benefit) $ 573 $ (3,413)