Earnings Per Share (Schedule of Earnings Per Share) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share [Abstract]                    
Net income $ 11,168 $ 5,481 $ 5,942 $ 11,137 $ 4,362 $ 2,069 $ 1,762 $ 3,743 $ 33,728 $ 11,936
Net income attributable to noncontrolling interests                 (6,035) (196)
Net income attributable to Safehold Inc. common shareholders for basic earnings per share                 $ 27,693 $ 11,740