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INVESTMENT IN HOTEL PROPERTIES, NET - Pro forma financial information (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) hotel $ / shares | Jun. 30, 2017 USD ($) $ / shares | Jun. 30, 2018 USD ($) hotel $ / shares | Jun. 30, 2017 USD ($) $ / shares
Business Combinations [Abstract] |  |  |  |
Number of hotels owed | hotel | 80 |  | 80 |
Revenues | $ 148,501 | $ 144,912 | $ 285,145 | $ 278,044
Income from hotel operations | 56,877 | 56,769 | 106,148 | 106,232
Net income | 19,640 | 25,656 | 28,971 | 47,072
Net income attributable to common stockholders, net of amount allocated to participating securities | $ 15,765 | $ 21,249 | $ 16,256 | $ 38,279
Basic net income per share attributable to common shareholders (in dollars per share) | $ / shares | $ 0.15 | $ 0.22 | $ 0.16 | $ 0.40
Diluted net income per share attributable to common shareholders (in dollars per share) | $ / shares | $ 0.15 | $ 0.22 | $ 0.16 | $ 0.40
Real estate tax expense, depreciation expense, interest expense, and other corporate expenses | $ 49,000 | $ 39,100 | $ 97,800 | $ 76,000
Premium on redemption of preferred stock |  |  | $ 3,300 |

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