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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, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Income from continuing operations attributable to iStar Inc. and allocable to common shareholders |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders | $ 58,421 | $ 34,481 | $ 26,553 | $ 9,724
Income from discontinued operations | 173 | 3,631 | 4,939 | 7,209
Gain from discontinued operations | 123,418 | 0 | 123,418 | 0
Income tax expense from discontinued operations | (4,545) | 0 | (4,545) | 0
Net income allocable to common shareholders | 177,467 | 38,112 | 150,365 | 16,933
Numerator for diluted earnings per share: |  |  |  |
Income from continuing operations attributable to iStar Inc. and allocable to common shareholders | 60,676 | 39,661 | 31,062 | 9,726
Income from discontinued operations | 173 | 3,632 | 4,939 | 7,209
Gain from discontinued operations | 123,418 | 0 | 123,418 | 0
Income tax expense from discontinued operations | (4,545) | 0 | (4,545) | 0
Net income attributable to iStar Inc. and allocable to common shareholders | $ 179,722 | $ 43,293 | $ 154,874 | $ 16,935
Denominator for basic and diluted earnings per share: |  |  |  |
Weighted average common shares outstanding for basic earnings per common share | 72,142 | 73,984 | 72,104 | 75,522
Add: Effect of assumed shares issued under treasury stock method for restricted stock units | 120 | 34 | 119 | 52
Add: Effect of joint venture shares | 298 | 298 | 298 | 298
Weighted average common shares outstanding for diluted earnings per common share | 88,195 | 118,510 | 88,156 | 75,872
Basic earnings per common share: |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | $ 0.81 | $ 0.47 | $ 0.37 | $ 0.13
Income (loss) from discontinued operations (in dollars per share) | 0.00 | 0.05 | 0.07 | 0.09
Gain from discontinued operations (in dollars per share) | 1.71 | 0.00 | 1.71 | 0.00
Income tax expense from discontinued operations (in dollars per share) | (0.06) | (0.00) | (0.06) | (0.00)
Net income (loss) attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | 2.46 | 0.52 | 2.09 | 0.22
Diluted earnings per common share: |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | 0.69 | 0.34 | 0.35 | 0.13
Income (loss) from discontinued operations (in dollars per share) | 0.00 | 0.03 | 0.06 | 0.09
Gain from discontinued operations (in dollars per share) | 1.40 | 0.00 | 1.40 | 0.00
Income tax expense from discontinued operations (in dollars per share) | (0.05) | (0.00) | (0.05) | (0.00)
Net income (loss) attributable to iStar Inc. and allocable to common shareholders (in dollars per share) | $ 2.04 | $ 0.37 | $ 1.76 | $ 0.22
Add: Effect of 1.50% senior convertible unsecured notes |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |
Add: Effect of senior convertible unsecured notes | 0 | 11,567 | 0 | 0
Add: Effect of 3.00% senior convertible unsecured notes |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |
Add: Effect of senior convertible unsecured notes | 0 | 16,992 | 0 | 0
Preferred Stock Series J |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |
Add: Effect of series J convertible perpetual preferred stock | 15,635 | 15,635 | 15,635 | 0

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