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Related Party Transactions - Additional Information (Detail) - $ / shares | Feb. 05, 2020 | Jan. 02, 2020
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Retired Officer [Member] |  |
Related Party Transaction [Line Items] |  |
Purchase of shares |  | 1,157
Shares price per share |  | $ 67.71
Number of trading days to be considered for average price of stock repurchased |  | 30 days
Current Officers and Retired Officer [Member] |  |
Related Party Transaction [Line Items] |  |
Purchase of shares | 39,208 |
Shares price per share | $ 58.65 |
Number of trading days to be considered for average price of stock repurchased | 30 days |

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