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Income Taxes - Reconciliation Between Cash and Stock Dividends Paid and Dividends Paid Deduction (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Dividends paid $ 96,835 $ 98,073 $ 180,092
Less: Dividends designated to prior year (5,133) (5,133) (8,383)
Plus: Dividends designated from the following year 5,133 5,133 5,133
Less: Return of capital 0 (32,946) (67,063)
Dividends paid deduction $ 96,835 $ 65,127 $ 109,779