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Common Stock and Other Equity Related Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended
--- | --- | ---
Apr. 13, 2018 | Mar. 31, 2018
Class of Stock [Line Items] |  |
OP units were exchanged for an equal number of shares of common stock |  | 6,838
Private Placement |  |
Class of Stock [Line Items] |  |
Common stock, available for issuance |  | $ 150.0
Subsequent Event |  |
Class of Stock [Line Items] |  |
Common stock, dividends paid (usd per share) | $ 0.550 |

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