v3.26.3
Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                    
Net income (loss) $ 47,234 $ (20,184) $ 3,123 $ (1,304) $ (25,172) $ 3,708 $ 30,175 $ (22,769)    
Net income (loss) attributable to noncontrolling interests:                    
Investment Entities (300)     2,288     3,272 5,976    
Net income (loss) attributable to BrightSpire Capital, Inc. common stockholders 46,934     984     33,447 (16,793)    
Numerator:                    
Dividends and undistributed earnings allocated to participating securities (non-vested shares) (1,291)     (458)     (1,680) (1,398)    
Numerator for basic income (loss) per common share 45,643     526     31,767 (18,191)    
Impact of assumed conversion of dilutive unvested PSUs 124     0     0 0    
Numerator for diluted income (loss) per common share $ 45,767     $ 526     $ 31,767 $ (18,191)    
Denominator:                    
Weighted average shares outstanding - basic (in shares) 122,318,000     126,940,000     124,974,000 127,089,000    
Weighted average shares outstanding - diluted (in shares) 122,900,000     129,845,000     125,953,000 127,089,000    
Net income (loss) per common share - basic (in dollars per share) $ 0.37     $ 0.00     $ 0.25 $ (0.14)    
Net income (loss) per common share - diluted (in dollars per share) $ 0.37     $ 0.00     $ 0.25 $ (0.14)    
Outstanding (in shares) 5,072,730 5,211,370 5,215,970 4,326,622 4,407,095 4,393,650 5,072,730 4,326,622 4,326,622 3,661,351
Antidilutive securities excluded from computation of earnings per share (in shares)               2,874,546    
PSUs                    
Denominator:                    
Unvested share-based compensation awards 582,000     0     979,000 0    
Outstanding (in shares) 1,665,684 1,665,684 1,665,684 1,461,223 1,461,223 1,461,223 1,665,684 1,461,223 1,461,223 918,434
Restricted Stock                    
Denominator:                    
Unvested share-based compensation awards 0     2,905,000     0 0    
Outstanding (in shares) 3,407,046 3,545,686 3,550,286 2,865,399 2,945,872 2,932,427 3,407,046 2,865,399 2,865,399 2,742,917