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Related Party Transactions - Additional Information (Detail) - $ / shares | Jul. 02, 2019 | Feb. 06, 2019
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Officer [Member] |  |
Related Party Transaction [Line Items] |  |
Purchase of shares |  | 36,413
Shares price per share |  | $ 56.44
Number of trading days to be considered for average price of stock repurchased |  | 30 days
Retired Officer [Member] |  |
Related Party Transaction [Line Items] |  |
Purchase of shares | 952 |
Shares price per share | $ 51.20 |
Number of trading days to be considered for average price of stock repurchased | 30 days |

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