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Earnings Per Share (Schedule of Earnings Per Share) (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Denominator for basic and diluted earnings per share: |  |  |  |  |
Weighted average common shares outstanding for basic earnings per common share | [1] | 85,766 | 85,163 | 85,602 | 84,967
Weighted average common shares outstanding for diluted earnings per common share | [1] | 85,766 | 130,160 | 85,602 | 84,967
Basic earnings per common share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders | [1] | $ (0.07) | $ 0.26 | $ (0.70) | $ (0.24)
Diluted earnings per common share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders | [1] | (0.07) | 0.21 | (0.70) | (0.24)
Net income (loss) attributable to iStar Inc. and allocable to common shareholders | [1] | (0.07) | 0.21 | (0.70) | (0.24)
Basic earnings per HPU share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to HPU holders | [1],[2] | (13.41) | 49.60 | (132.19) | (45.53)
Net income (loss) attributable to iStar Inc. and allocable to HPU holders | [1] | (0.07) | 0.26 | (0.70) | (0.24)
Diluted earnings per HPU share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to HPU holders | [1],[2] | (13.41) | 40.13 | (132.19) | (45.53)
Net income (loss) attributable to iStar Inc. and allocable to HPU holders | [1],[2] | $ (13.41) | $ 40.13 | $ (132.19) | $ (45.53)
Common Stock |  |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |  |
Weighted average common shares outstanding for basic earnings per common share |  | 85,766 | 85,163 | 85,602 | 84,967
Add: Effect of assumed shares issued under treasury stock method for restricted shares |  | 0 | 505 | 0 | 0
Weighted average common shares outstanding for diluted earnings per common share |  | 85,766 | 130,160 | 85,602 | 84,967
Basic earnings per common share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders |  | $ (0.07) | $ 0.26 | $ (0.70) | $ (0.24)
Net income (loss) attributable to iStar Inc. and allocable to common shareholders |  | (0.07) | 0.26 | (0.70) | (0.24)
Diluted earnings per common share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders |  | (0.07) | 0.21 | (0.70) | (0.24)
Net income (loss) attributable to iStar Inc. and allocable to common shareholders |  | $ (0.07) | $ 0.21 | $ (0.70) | $ (0.24)
HPU's |  |  |  |  |
Denominator for basic and diluted earnings per HPU share: |  |  |  |  |
Weighted average High Performance Units outstanding for basic and diluted earnings per share | [3] | 7 | 15 | 12 | 15
Basic earnings per HPU share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to HPU holders |  | $ (13.41) | $ 49.60 | $ (132.19) | $ (45.53)
Net income (loss) attributable to iStar Inc. and allocable to HPU holders |  | (13.41) | 49.60 | (132.19) | (45.53)
Diluted earnings per HPU share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to HPU holders |  | (13.41) | 40.13 | (132.19) | (45.53)
Net income (loss) attributable to iStar Inc. and allocable to HPU holders |  | $ (13.41) | $ 40.13 | $ (132.19) | $ (45.53)
Basic | Common Stock |  |  |  |  |
Numerator for basic and diluted earnings per share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders |  | $ (6,072) | $ 22,327 | $ (59,818) | $ (20,454)
Net income (loss) attributable to iStar Inc. and allocable to common shareholders |  | (6,072) | 22,327 | (59,818) | (20,454)
Basic | HPU's |  |  |  |  |
Numerator for basic and diluted earnings per HPU share |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to HPU holders | [3] | (94) | 744 | (1,627) | (683)
Net income (loss) attributable to iStar Inc. and allocable to HPU holders | [3] | (94) | 744 | (1,627) | (683)
Diluted | Common Stock |  |  |  |  |
Numerator for basic and diluted earnings per share: |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders |  | (6,072) | 27,608 | (59,818) | (20,454)
Net income (loss) attributable to iStar Inc. and allocable to common shareholders |  | (6,072) | 27,608 | (59,818) | (20,454)
Diluted | HPU's |  |  |  |  |
Numerator for basic and diluted earnings per HPU share |  |  |  |  |
Income (loss) from continuing operations attributable to iStar Inc. and allocable to HPU holders | [3] | (94) | 602 | (1,627) | (683)
Net income (loss) attributable to iStar Inc. and allocable to HPU holders | [3] | $ (94) | $ 602 | $ (1,627) | $ (683)
Joint venture shares | Common Stock |  |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |  |
Add: Effect of joint venture shares |  | 0 | 298 | 0 | 0
1.50% convertible senior unsecured notes | Common Stock |  |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |  |
Add Effect of 1.50% and 3.00% senior convertible unsecured notes |  | 0 | 11,567 | 0 | 0
3.00% convertible senior unsecured notes | Common Stock |  |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |  |
Add Effect of 1.50% and 3.00% senior convertible unsecured notes |  | 0 | 16,992 | 0 | 0
Series J convertible perpetual preferred stock | Common Stock |  |  |  |  |
Denominator for basic and diluted earnings per share: |  |  |  |  |
Add: Effect of series J convertible perpetual preferred stock |  | 0 | 15,635 | 0 | 0
[1] | Income (loss) from continuing operations attributable to iStar Inc. was $(19.8) million and $(89.0) million for the three and nine months ended September 30, 2015, respectively, and $8.1 million and $(44.1) million for the three and nine months ended September 30, 2014, respectively. Refer to Note 14 for details on the calculation of earnings per share.
[2] | All of the Company's outstanding High Performance Units ("HPUs") were repurchased and retired on August 13, 2015 (refer to Note 12)
[3] | All of the Company's outstanding HPUs were repurchased and retired on August 13, 2015 (refer to Note 12).

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