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Earnings Per Share (Earnings Allocable to Common Shares) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Numerator for basic earnings per share: |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders | $ 42,873 | $ 58,421 | $ 69,680 | $ 26,553
Income from discontinued operations | 0 | 173 | 0 | 4,939
Gain from discontinued operations | 0 | 123,418 | 0 | 123,418
Income tax expense from discontinued operations | 0 | (4,545) | 0 | (4,545)
Net income allocable to common shareholders | 42,873 | 177,467 | 69,680 | 150,365
Numerator for diluted earnings per share: |  |  |  |
Income from continuing operations attributable to iStar Inc. and allocable to common shareholders | 45,123 | 60,676 | 74,180 | 31,062
Income from discontinued operations | 0 | 173 | 0 | 4,939
Gain from discontinued operations | 0 | 123,418 | 0 | 123,418
Income tax expense from discontinued operations | 0 | (4,545) | 0 | (4,545)
Net income attributable to iStar Inc. and allocable to common shareholders | $ 45,123 | $ 179,722 | $ 74,180 | $ 154,874
Denominator for basic and diluted earnings per share: |  |  |  |
Weighted average common shares outstanding for basic earnings per common share (in shares) | 67,932 | 72,142 | 67,922 | 72,104
Add: Effect of assumed shares issued under treasury stock method for restricted stock units (in shares) | 127 | 120 | 125 | 119
Add: Effect of joint venture shares (in shares) | 0 | 298 | 0 | 298
Add: Effect of series J convertible perpetual preferred stock (in shares) | 15,635 | 15,635 | 15,635 | 15,635
Weighted average common shares outstanding for diluted earnings per common share (in shares) | 83,694 | 88,195 | 83,682 | 88,156
Basic earnings per common share: |  |  |  |
Income from continuing operations attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | $ 0.63 | $ 0.81 | $ 1.03 | $ 0.37
Income from discontinued operations (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.07
Gain from discontinued operations (in dollars per share) | 0.00 | 1.71 | 0.00 | 1.71
Income tax expense from discontinued operations (in dollars per share) | (0.00) | (0.06) | (0.00) | (0.06)
Net income attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | 0.63 | 2.46 | 1.03 | 2.09
Diluted earnings per common share: |  |  |  |
Income from continuing operations attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | 0.54 | 0.69 | 0.89 | 0.35
Income from discontinued operations (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.06
Gain from discontinued operations (in dollars per share) | 0.00 | 1.40 | 0.00 | 1.40
Income tax expense from discontinued operations (in dollars per share) | (0.00) | (0.05) | (0.00) | (0.05)
Net income attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | $ 0.54 | $ 2.04 | $ 0.89 | $ 1.76

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