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Capital (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Aug. 23, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Partners' Capital [Line Items] |  |  |  |
Gross proceeds from sale of shares | $ 621,800 | $ 0 | $ 611,206 | $ 0
Shares and Units [Abstract] |  |  |  |
OP units outstanding (shares) |  | 300,400,000 |  |
OP units owned by the Company (shares) |  | 161,500,000 |  |
OP units owned by the Company, percent |  | 53.80% |  |
OP units not owned by the Company (shares) |  | 138,900,000 |  |
OP units not owned by the Company, percent |  | 46.20% |  |
Percentage of dividends on common stock received until performance criteria met for LTIP units |  | 10.00% | 10.00% |
Percentage of dividends on common stock received after performance criteria met for LTIP units |  | 90.00% | 90.00% |
Percentage of dividends on common stock received in periods after performance criteria met for LTIP units |  | 100.00% | 100.00% |
Private perpetual preferred units, liquidation preference per share (in dollars per share) |  | $ 16.62 | $ 16.62 |
Series PR Common Units [Member] |  |  |  |
Shares and Units [Abstract] |  |  |  |
OP units not owned by the Company (shares) |  | 91,759,741 | 93,075,441 |
Private Perpetual Preferred Units [Member] |  |  |  |
Shares and Units [Abstract] |  |  |  |
Private perpetual preferred units (shares) |  | 1,560,360 |  |
Private perpetual preferred units, liquidation preference per share (in dollars per share) |  | $ 16.62 |  |
Dividend declared (in dollars per share) |  | $ 0.60 |  |
Common shares [Member] | Common Class A [Member] |  |  |  |
Partners' Capital [Line Items] |  |  |  |
Issuance of common shares (in shares) | 29,610,854 |  | 29,610,854 |
Common shares issued (USD per share) | $ 21.00 |  |  |
General Partner [Member] | Series PR Common Units [Member] |  |  |  |
Partners' Capital [Line Items] |  |  |  |
Issuance of common shares (in shares) | 29,610,854 |  | 29,611,000 |
Q REIT Holding LLC [Member] |  |  |  |
Partners' Capital [Line Items] |  |  |  |
Interest held by subsidiary of QIA | 9.90% |  |  |

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