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Description of Operations - Additional Information (Details) - USD ($) |  |  |  |  | 9 Months Ended
--- | --- | --- | --- | --- | ---
May 31, 2019 | May 14, 2019 | May 08, 2019 | Apr. 15, 2019 | Sep. 30, 2019 | Sep. 28, 2018
Description Of Operations Disclosure [Line Items] |  |  |  |  |  |
Proceeds from IPO |  |  |  |  | $ 536,879,000 | $ 0
Funds to dividend through public offering |  | $ 52,100,000 |  |  |  |
Repayment on term loan through public offering |  | $ 150,000 |  |  |  |
Common stock dividend ratio |  |  |  | 200.00% |  |
Dividends payment, date |  |  |  | May 08, 2019 |  |
IPO | Common Stock |  |  |  |  |  |
Description Of Operations Disclosure [Line Items] |  |  |  |  |  |
Common stock shares sold |  |  | 18,518,500 |  |  |
Common stock sold per share |  |  | $ 27.00 |  |  |
Share price |  | $ 25.515 |  |  |  |
Proceeds from IPO |  | $ 536,900,000 |  |  |  |
Underwriters | Common Stock |  |  |  |  |  |
Description Of Operations Disclosure [Line Items] |  |  |  |  |  |
Purchase of additional shares upon exercise of options | 2,777,775 |  |  |  |  |
Underwriting discount per share |  | $ 1.485 |  |  |  |
Proceeds from IPO |  | $ 536,900,000 |  |  |  |

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