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Debt - Debt Refinancing and Senior Notes Due 2019 Exchange Transaction (Details) - USD ($) |  |  |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 21, 2017 | Apr. 01, 2017 | Mar. 01, 2017 | Apr. 15, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Jun. 30, 2017 | Feb. 06, 2017
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repurchase payments of long term debt |  |  |  |  | $ 50,335,000 | $ 133,079,000 |  |
Common Stock | Scenario, Forecast |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Required amount of proceeds received in public offering for exchange agreement to occur |  | $ 400,000,000 |  |  |  |  |  |
Gross proceeds from initial public offering, percent of equity value |  | 10.00% |  |  |  |  |  |
Common Stock | Class A Common Stock |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Issuance of Class A common stock (in shares) |  |  |  |  | 35,000,000 |  |  |
IPO | Class A Common Stock |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Sale of common stock in IPO (in dollars per share) |  |  |  |  |  |  |  | $ 14.00
Senior Notes | Senior Notes Due 2019 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Common stock shares issuable, percentage of aggregate principal amount |  |  |  | 104.625% |  |  |  |
Amount to be divided by initial public offering price per share, to determine number of shares authorized for exchange |  |  |  | $ 261,600,000 |  |  |  |
Repurchase of aggregate principal amount |  |  | $ 22,556,000 |  |  |  |  |
Repurchase price, percent |  |  | 104.625% |  |  |  |  |
Repurchase payments of long term debt |  |  | $ 23,599,000 |  |  |  |  |
Senior Notes | Senior Notes Due 2019 | Scenario, Forecast |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amount of debt to be exchanged |  | $ 250,000,000 |  |  |  |  |  |
Issuance of Class A common stock (in shares) |  | 18,683,000 |  |  |  |  |  |
Period for repurchase of additional principal amount |  | 60 days |  |  |  |  |  |
Amount able to be purchased after IPO |  | $ 62,500,000 |  |  |  |  |  |
Subsequent Event | Convertible Debt | Exchanged Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amount of debt to be exchanged | $ 250,000,000 |  |  |  |  |  |  |
Subsequent Event | Senior Notes | Senior Notes Due 2019 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 9.25% |

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