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Stockholders' Equity (Details) - USD ($) |  | 6 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 19, 2019 | Sep. 30, 2019 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 26, 2019 | Mar. 25, 2019 | May 02, 2018 | Apr. 12, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock shares authorized (in shares) |  |  | 140,000,000 | 140,000,000 |  |  |  | 140,000,000
Common stock par value (in dollars per share) |  |  | $ 0.01 | $ 0.01 |  |  |  | $ 0.01
Preferred stock shares authorized (in shares) |  |  | 10,000,000 | 10,000,000 |  |  |  | 10,000,000
Preferred stock par value (in dollars per share) |  |  | $ 0.01 | $ 0.01 |  |  |  | $ 0.01
Remaining authorized repurchase amount |  |  |  |  |  | $ 299,401,000 |  |
Dividends declared (in dollars per share) | $ 0.05 |  |  |  |  |  |  |
Regular quarterly cash dividend | $ 2,600,000 |  |  |  |  |  |  |
New Stock Repurchase Program |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Authorized amount of stock to be repurchased, value |  |  |  |  | $ 70,000,000.0 |  |  |
Shares repurchased (in shares) |  | 500,000 |  |  |  |  |  |
Treasury stock purchase, value |  | $ 10,600,000 |  |  |  |  |  |
Remaining authorized repurchase amount |  |  | $ 58,800,000 |  |  |  |  |
The First Stock Repurchase Program |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Authorized amount of stock to be repurchased, value |  |  |  |  |  |  | $ 40,000,000.0 |

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