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Summary of Changes in Stockholders Equity (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended
--- | --- | ---
Mar. 20, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Shareholders Equity [Line Items] |  |  |
Dividends paid to stockholders, per share | $ 0.36 |  |
First Quarter Dividend |  |  |
Shareholders Equity [Line Items] |  |  |
Dividends paid to stockholders, per share |  |  | $ 0.36
ASU 2020-06 |  |  |
Shareholders Equity [Line Items] |  |  |
Deferred taxes |  | $ 23,756 |

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