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Equity and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance |  |  | $ 249,744 |  |
Comprehensive income | $ (988) | $ 289 | (1,711) | $ 783 |
Net income | 2,205 | 2,525 | 6,878 | 7,130 |
Stockholders' equity, ending balance | 259,420 |  | 259,420 |  |
Total Equity | 264,085 | 251,216 | 264,085 | 251,216 | $ 254,419
Senior Common Stock |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | 1 | 1 | 1 | 1 |
Issuance of Series A and B preferred stock and common stock, net | 0 | 0 | 0 | 0 |
Stockholders' equity, ending balance | 1 | 1 | 1 | 1 |
Series A and B Preferred Stock |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | 2 | 2 | 2 | 2 |
Issuance of Series A and B preferred stock and common stock, net | 0 | 0 | 0 | 0 |
Stockholders' equity, ending balance | 2 | 2 | 2 | 2 |
Common Stock |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | 30 | 28 | 29 | 28 |
Issuance of Series A and B preferred stock and common stock, net | 1 | 1 | 2 | 1 |
Stockholders' equity, ending balance | 31 | 29 | 31 | 29 |
Additional Paid in Capital |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | 573,868 | 535,399 | 559,977 | 534,790 |
Issuance of Series A and B preferred stock and common stock, net | 19,135 | 2,877 | 33,246 | 3,520 |
Retirement of senior common stock, net | 0 | 0 | 0 | (34) |
Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership | (297) | 0 | (517) | 0 |
Stockholders' equity, ending balance | 592,706 | 538,276 | 592,706 | 538,276 |
Accumulated Other Comprehensive Income |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | (870) | 530 | (148) | 35 |
Comprehensive income | (989) | 288 | (1,711) | 783 |
Stockholders' equity, ending balance | (1,859) | 818 | (1,859) | 818 |
Distributions in Excess of Accumulated Earnings |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | (319,402) | (276,927) | (310,117) | (268,058) |
Distributions declared to common, senior common, and preferred stockholders | 14,280 | 13,508 | 28,193 | 26,982 |
Net income | 2,221 | 2,525 | 6,849 | 7,130 |
Stockholders' equity, ending balance | (331,461) | (287,910) | (331,461) | (287,910) |
Total Stockholders' Equity |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | 253,629 | 259,033 | 249,744 | 266,798 |
Issuance of Series A and B preferred stock and common stock, net | 19,136 | 2,878 | 33,248 | 3,521 |
Retirement of senior common stock, net | 0 | 0 | 0 | (34) |
Distributions declared to common, senior common, and preferred stockholders | 14,280 | 13,508 | 28,193 | 26,982 |
Comprehensive income | (989) | 288 | (1,711) | 783 |
Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership | (297) | 0 | (517) | 0 |
Net income | 2,221 | 2,525 | 6,849 | 7,130 |
Stockholders' equity, ending balance | 259,420 | 251,216 | 259,420 | 251,216 |
Non-Controlling Interest |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stockholders' equity, beginning balance | 4,662 | 0 | 4,675 | 0 |
Distributions declared to common, senior common, and preferred stockholders | 278 | 0 | 556 | 0 |
Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership | 297 | 0 | 517 | 0 |
Net income | (16) | 0 | 29 | 0 |
Stockholders' equity, ending balance | $ 4,665 | $ 0 | $ 4,665 | $ 0 |

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