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Reconciliations of Equity - Reconciliations of Total Equity (Parenthetical) (Detail) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Number of shares of common stock issued under incentive compensation plan | 6,791 | 1,133 | 32,772 | 2,647
Number of common stock shares purchased |  | 69,734 |  | 167,940
Common stock | $ 0.365 | $ 0.335 | $ 0.73 | $ 0.67
Common Stock [Member] |  |  |  |
Number of shares of common stock issued under incentive compensation plan | 6,791 | 1,133 | 32,772 | 2,647
Additional Paid-in Capital [Member] |  |  |  |
Number of shares of common stock issued under incentive compensation plan | 6,791 | 1,133 | 32,772 | 2,647
Common Treasury Stock [Member] |  |  |  |
Number of common stock shares purchased |  | 69,734 |  | 167,940
Retained Earnings [Member] |  |  |  |
Common stock | $ 0.365 | $ 0.335 | $ 0.73 | $ 0.67

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