X0305 4 2012-05-29 false 0000885508 STRATUS PROPERTIES INC STRS 0001200799 ARMSTRONG WILLIAM H III 212 LAVACA STREET SUITE 300 AUSTIN TX 78701 true true false false Chair of Board,President, CEO Common Stock 3250 I IRA for self Common Stock 2012-05-29 4 P false 405 8.15 A 428164 D Amount beneficially owned following the reported transaction includes 60,500 Common Stock Restricted Stock Units. Kelly C. Simoneaux, on behalf of William H. Armstrong III pursuant to a power of attorney 2012-05-31