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Shareholders' Equity - Narrative (Detail) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 series shares | Sep. 30, 2022 shares | Sep. 30, 2023 USD ($) series shares | Sep. 30, 2022 USD ($) shares | Dec. 31, 2022 series | Aug. 25, 2021 shares
Capital Unit [Line Items] |  |  |  |  |  |
Stock repurchase program, number of shares authorized to be repurchased |  |  |  |  |  | 3,235,326
Percentage of company's outstanding shares |  |  |  |  |  | 10.00%
Repurchase of common shares (in shares) | 0 | 0 | 1,379,883 | 664,145 |  |
Repurchase of common shares | $ |  |  | $ 39,806 | $ 27,820 |  |
Preferred stock, number of series outstanding | series | 2 |  | 2 |  | 2 |
London Interbank Offered Rate (LIBOR) | Series E Preferred Stock |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |
Preferred stock dividend rate, basis spread of variable rate |  |  | 5.14% |  |  |
London Interbank Offered Rate (LIBOR) | Series F Preferred Stock |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |
Preferred stock dividend rate, basis spread of variable rate |  |  | 4.762% |  |  |

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