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Capital Structure - Share Repurchase Program (Details) - USD ($) shares in Millions |  | 3 Months Ended | 11 Months Ended |
--- | --- | --- | --- | ---
Jul. 27, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Feb. 28, 2018
Class of Stock [Line Items] |  |  |  |  |
Authorized repurchase amount | $ 100,000,000 |  |  |  |
Increase in authorized repurchase amount | $ 50,000,000 |  |  |  |
Value of shares repurchased |  | $ 8,805,000 | $ 14,444,000 |  |
Class A |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Authorized repurchase amount |  |  |  |  | $ 50,000,000.0
Number of shares repurchased |  |  |  | 2.6 |
Value of shares repurchased |  |  |  | $ 65,900,000 |
Remaining capacity for future purchases |  | $ 34,100,000 |  |  |

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