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Capital (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 9 Months Ended |
--- | --- | --- | ---
Aug. 23, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Class of Stock [Line Items] |  |  |  |
Gross proceeds from sale of shares | $ 621,800 | $ 611,278 | $ 0 |
Shares and Units [Abstract] |  |  |  |
OP units outstanding (in shares) |  | 299,099,533 |  |
OP units owned by the Company (in shares) |  | 154,925,644 |  |
OP units owned by the Company, percent |  | 51.80% |  |
OP units not owned by the Company (in shares) |  | 144,173,889 |  |
OP units not owned by the Company, percent |  | 48.20% |  |
Percentage of dividends on common stock received until performance criteria met for LTIP units |  | 10.00% |  |
Percentage of dividends on common stock received after performance criteria met for LTIP units |  | 90.00% |  |
Percentage of dividends on common stock received in periods after performance criteria met for LTIP units |  | 100.00% |  |
Series PR operating partnership units |  |  |  |
Shares and Units [Abstract] |  |  |  |
OP units not owned by the Company (in shares) |  | 93,507,101 |  | 93,863,451
Qatar Investment Authority, affiliate |  |  |  |
Class of Stock [Line Items] |  |  |  |
Economic interest held by affiliate of QIA | 9.90% |  |  |
Common shares | Common class A shares |  |  |  |
Class of Stock [Line Items] |  |  |  |
Issuance of common shares (in shares) | 29,610,854 |  |  |
Common shares issued (in dollars per share) | $ 21.00 |  |  |
General partner | Series PR operating partnership units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Issuance of common shares (in shares) | 29,610,854 | 29,611,000 |  |

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