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Net Federal Income Taxes and Cash Interest Paid (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Supplemental Cash Flow Information [Abstract]      
Federal income taxes paid $ 426 $ 54 $ 162
Federal income taxes recovered 0 0 10,987
Interest paid $ 5,125 $ 10,340 $ 16,602