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Stockholders' Equity - Additional Information (Detail) - $ / shares | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jul. 30, 2018 | Jun. 30, 2018
Equity Class Of Treasury Stock [Line Items] |  |
Repurchase of shares |  | 500,300
Shares repurchased average price |  | $ 104.62
Subsequent Event [Member] |  |
Equity Class Of Treasury Stock [Line Items] |  |
Repurchase of shares | 126,000 |
Shares repurchased average price | $ 106.93 |
Stock repurchase remaining number of shares authorized to be repurchased | 3,563,128 |

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