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Stockholders' Equity - Additional Information (Details) - USD ($) |  | 6 Months Ended
--- | --- | ---
Apr. 12, 2018 | Jun. 30, 2018
Class Of Stock [Line Items] |  |
Stock issued during period shares | 5,405,000 |
Shares issued price per share | $ 37.50 |
Gross proceeds from issuance of common stock | $ 202,688,000 |
Net proceeds after underwriting discounts and offering expenses | $ 192,053,000 | $ 192,053,000
Over-Allotment Option |  |
Class Of Stock [Line Items] |  |
Stock issued during period shares | 705,000 |

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