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Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Apr. 20, 2020 | Jun. 13, 2017 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Nov. 21, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock authorized (shares) | 450,000,000 |  |  | 450,000,000 |  | 450,000,000 |  | 450,000,000.0 |  |  |  |
Common stock, par value per share ($ per share) | $ 0.01 |  |  | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 |
Common stock issued (shares) | 144,408,052 |  |  | 144,408,052 |  | 144,408,052 |  | 143,600,000 |  |  |  |
Common Stock, Shares, Outstanding | 144,400,000 |  |  | 144,400,000 |  | 144,400,000 |  | 143,600,000 |  |  |  |
Preferred stock authorized (shares) | 50,000,000 |  |  | 50,000,000 |  | 50,000,000 |  | 50,000,000.0 |  |  |  |
Preferred stock, par value per share ($ per share) | $ 0.01 |  |  | $ 0.01 |  | $ 0.01 |  |  |  |  |  |
Series A Preferred Stock outstanding (shares) | 400,000 |  |  | 400,000 |  | 400,000 |  |  |  |  |  |
Series A Preferred Stock Issued (shares) | 400,000 | 400,000 |  | 400,000 |  | 400,000 |  |  |  |  |  |
Temporary Equity, Par or Stated Value Per Share |  | $ 0.01 |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock dividend rate (%) |  |  |  | 7.00% |  | 7.00% |  |  |  |  |  |
Dividend Period | 12 months |  |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock terms of conversion | The Series A Preferred Stock is convertible at the option of any holder at any time into shares of our common stock at an initial conversion price of $16.00 per share and an initial conversion rate of 62.50 shares of our common stock per share of Series A Preferred Stock, subject to certain anti-dilution adjustments. The issuance of shares of our common stock upon the conversion of Series A Preferred Stock is subject to a cap equal to 28,856,239 shares of our common stock (the “Share Cap”), unless and until the Company obtains stockholder approval to the extent required for the issuance of additional shares. Any amounts owed above the Share Cap must be paid in cash.Subject to certain conditions, at the Company’s option, (i) after the third anniversary of the Closing Date, all of the Series A Preferred Stock may be converted into shares of our common stock, and (ii) after the seventh anniversary of the Closing Date, all of the Series A Preferred Stock may be redeemed for cash at a redemption price equal to 100% of the liquidation preference of the Series A Preferred Stock, plus any accrued and unpaid dividends. Subject to certain conditions, each holder of the Series A Preferred Stock, after a Change of Control (as defined in the Articles) may (i) require the Company to purchase any or all of their shares of Series A Preferred Stock at a redemption price payable in cash equal to 105% of the liquidation preference of the Series A Preferred Stock, plus any accrued and unpaid dividends, or (ii) convert any or all of their shares of Series A Preferred Stock into the number of shares of our common stock equal to the liquidation preference (including accrued and unpaid dividends) divided by the then-applicable conversion price. |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Conversion Price ($ per share) | $ 16.00 |  |  | $ 16.00 |  | $ 16.00 |  |  |  |  |  |
Convertible Preferred Stock, Common Shares Issuable (shares) | 62.50 |  |  | 62.50 |  | 62.50 |  |  |  |  |  |
Redemption Price As A Percentage of Liquidation Preference | 100.00% |  |  | 100.00% |  | 100.00% |  |  |  |  |  |
Distributions to holders of Class A equity interests of a subsidiary |  |  |  |  |  | $ 61.1 | $ 103.9 |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend Percentage In Excess Of Required Distributions For A REIT |  |  |  |  |  | 5.00% |  |  |  |  |  |
Convertible Preferred Stock, Common Shares Issuable (shares) | 28,856,239 |  |  | 28,856,239 |  | 28,856,239 |  |  |  |  |  |
At-The-Market Equity Offering Program |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
ATM Program, authorized amount outstanding | $ 232.5 |  |  | $ 232.5 |  | $ 232.5 |  |  |  |  |  | $ 300.0
Shares issued under the ATM Program (shares) |  |  |  | 0 |  | 0 |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Distributions to holders of Class A equity interests of a subsidiary |  |  |  | $ 0.0 | $ 0.5 | $ 0.4 | $ 1.1 |  |  |  |  |
Business Acquisition, Equity interest issued (shares) |  |  | 1,953,407 |  |  |  |  |  |  |  |  |
Equity interests redeemed during the period (shares) |  |  |  |  |  | 1,026,727 |  |  |  |  |  |
Series A Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issuance price ($ per share) |  | $ 1,000 |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity |  | $ 400.0 |  |  |  |  |  |  |  |  |  |
Series A Preferred Stock Annual Dividend Rate Percentage Increase | 0.75% |  |  | 0.75% |  | 0.75% |  |  |  |  |  |
Convertible Preferred Stock, Common Shares Issuable (shares) | 25,000,000.0 |  |  | 25,000,000.0 |  | 25,000,000.0 |  |  |  |  |  |
Redemption Price After Change Of Control As A Percentage of Liquidation Preference | 105.00% |  |  | 105.00% |  | 105.00% |  |  |  |  |  |
Distributions to holders of Class A equity interests of a subsidiary |  |  |  | $ 5.5 |  |  |  |  |  |  |  |

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