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Capital Stock - Narrative (Detail) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |
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Dec. 22, 2021 USD ($) $ / shares | Sep. 24, 2021 USD ($) $ / shares | Jun. 23, 2021 USD ($) $ / shares | Mar. 19, 2021 USD ($) $ / shares | Feb. 09, 2021 $ / shares | Dec. 23, 2020 USD ($) $ / shares | Sep. 23, 2020 USD ($) $ / shares | Jun. 26, 2020 USD ($) $ / shares | Mar. 18, 2020 USD ($) $ / shares | Feb. 06, 2020 $ / shares | Dec. 18, 2019 USD ($) $ / shares | Sep. 20, 2019 USD ($) $ / shares | Jun. 21, 2019 USD ($) $ / shares | Mar. 20, 2019 USD ($) $ / shares | Feb. 07, 2019 $ / shares | Feb. 12, 2018 $ / shares | Dec. 31, 2021 USD ($) votes $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 $ / shares | Sep. 30, 2021 USD ($)
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares, authorized (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000,000 | 500,000,000 |  |  |
Common shares, par value (in usd per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.01 | $ 0.01 |  |  |
Preferred shares, authorized (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 250,000,000 | 250,000,000 |  |  |
Preferred shares, par value (in usd per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.01 | $ 0.01 |  |  |
Common shares, issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 185,336,357 | 189,045,661 |  |  |
Common shares, outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 185,336,357 | 189,045,661 |  |  |
Preferred shares, outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Preferred shares, issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Common stock, number of votes per share | votes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |
Stock repurchase authorized amount | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,750,000
Shares repurchased and retired (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,577,562 | 3,412,293 | 766,154 |  |
Common stock shares repurchased price per share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 45.32 | $ 40.16 | $ 39.16 |  |
Aggregate amount of common stock shares repurchased | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 298,219 | $ 137,112 | $ 30,015 |  |
Expenses related to stock purchases | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 132 | $ 68 | $ 15 |  |
Stock repurchase program remained available for share | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 338,911 |  |  |  |
Increase in quarterly cash dividend (in percentage) |  |  |  |  | 10.00% |  |  |  |  | 15.00% |  |  |  |  | 13.00% |  |  |  |  |  |
Dividends per common share (in usd per share) | $ / shares |  |  |  |  | $ 0.1075 |  |  |  |  | $ 0.0975 |  |  |  |  | $ 0.085 | $ 0.075 | $ 0.43 | $ 0.39 | $ 0.34 |  |
Annual dividend per common share (in usd per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.39 |  |  |  |  | $ 0.34 |  |  | 0.39 | $ 0.34 |  |
Planned annual dividend (in usd per share) | $ / shares |  |  |  |  | $ 0.43 |  |  |  |  |  |  |  |  |  |  |  | 0.43 |  |  | $ 0.30 |
Dividends paid per share (in usd per share) | $ / shares | $ 0.1075 | $ 0.1075 | $ 0.1075 | $ 0.1075 |  | $ 0.0975 | $ 0.0975 | $ 0.0975 | $ 0.0975 |  | $ 0.085 | $ 0.085 | $ 0.085 | $ 0.085 |  |  | $ 0.1075 | $ 0.0975 |  |  |
Initial dividend paid | $ | $ 20,018 | $ 20,213 | $ 20,133 | $ 20,115 |  | $ 18,437 | $ 18,637 | $ 18,595 | $ 18,543 |  | $ 16,156 | $ 16,208 | $ 16,188 | $ 16,119 |  |  |  |  |  |  |
Share repurchase open market |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of common stock shares repurchased | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 298,087 | $ 137,044 | $ 30,000 |  |

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