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Equity - Narrative (Details) |  |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 16, 2018 shares | Mar. 01, 2018 | Jan. 10, 2017 shares | Jun. 30, 2018 $ / shares shares | Jun. 30, 2017 $ / shares | Jun. 30, 2018 USD ($) $ / shares shares | Jun. 30, 2017 USD ($) $ / shares | Mar. 08, 2018 USD ($) | Dec. 31, 2017 shares | Jan. 20, 2016 USD ($)
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Company-owned common units in the operating partnership (in shares) |  |  |  | 155,647,733 |  | 155,647,733 |  |  | 155,602,508 |
Company's ownership interest percentage |  |  |  | 99.60% |  | 99.60% |  |  | 99.60% |
Non-controlling ownership interest percentage |  |  |  | 0.40% |  | 0.40% |  |  | 0.40% |
Proceeds from issuance of common stock, net | $ |  |  |  |  |  | $ (207,000) | $ 647,509,000 |  |  |
Stock repurchase program authorized | $ |  |  |  |  |  |  |  | $ 250,000,000.0 |  | $ 100,000,000
Common dividends declared (in dollars per share) | $ / shares |  |  |  | $ 0.25 | $ 0.250 | $ 0.5 | $ 0.500 |  |  |
Shares issued during period (in shares) |  |  | 18,673,808 |  |  |  |  |  |  |
At-the-Market |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum shares authorized, value | $ |  |  |  |  |  | $ 125,000,000 |  |  |  |
Proceeds from issuance of common stock, net | $ |  |  |  |  |  | $ 20,100,000 |  |  |  |
VIE, Primary Beneficiary | HPP-MAC WSP, LLC |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership Interest |  | 75.00% |  |  |  | 75.00% |  |  |  |
6.25% series A cumulative redeemable preferred units of the Operating Partnership |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Shares outstanding of preferred stock (in shares) |  |  |  |  |  |  |  |  | 407,066 |
Shares redeemed during period | 14,468 |  |  |  |  |  |  |  |  |
Liquidation preference of preferred stock (dollars per share) | $ / shares |  |  |  | 25 |  | $ 25 |  |  |  |
Interest rate of preferred stock |  |  |  |  |  | 6.25% |  |  |  |
Preferred dividends declared (dollars per share) | $ / shares |  |  |  | $ 0.3906 |  |  |  |  |  |
Performance units |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion ratio |  |  |  |  |  | 1 |  |  |  |
Common Stock/Units |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Non-controlling common units in the operating partnership (in shares) |  |  |  | 569,045 |  | 569,045 |  |  | 569,045 |
Partnership Interest |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Company-owned common units in the operating partnership (in shares) |  |  |  | 155,647,733 |  | 155,647,733 |  |  | 155,602,508 |

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