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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Numerator: |  |  |  |
Net income | $ 37,677 | $ 34,083 | $ 47,368 | $ 67,289
Less: Preferred dividends | (3,709) | (4,200) | (9,252) | (8,400)
Premium on redemption of preferred stock | 0 | 0 | (3,277) | 0
Allocation to participating securities | (120) | (126) | (137) | (240)
Attributable to non-controlling interest | (101) | (114) | (104) | (234)
Net income attributable to common stockholders | $ 33,747 | $ 29,643 | $ 34,598 | $ 58,415
Denominator: |  |  |  |
Weighted average common shares outstanding - basic (in shares) | 103,643,000 | 98,184,000 | 103,572,000 | 95,488,000
Dilutive effect of equity-based compensation awards (in shares) | 240,000 | 522,000 | 320,000 | 495,000
Weighted average common shares outstanding - diluted (in shares) | 103,883,000 | 98,706,000 | 103,892,000 | 95,983,000
Basic (in dollars per share) | $ 0.33 | $ 0.30 | $ 0.33 | $ 0.61
Diluted (in dollars per share) | $ 0.32 | $ 0.30 | $ 0.33 | $ 0.61
Restricted Stock Awards |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities excluded from computation of diluted earnings per share (in shares) | 453,664 | 619,429 | 453,664 | 619,429

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