X0306 4 2015-12-31 false 0001079577 STANCORP FINANCIAL GROUP INC SFG 0001439366 Hooper John A 1100 SW 6TH AVE PORTLAND OR 97204 false true false false Vice President Human Resources common stock 2015-12-31 4 M false 455 66.96 A 984 D common stock 2015-12-31 4 M false 588 66.19 A 1572 D common stock 2015-12-31 4 F false 336 114.14 D 1236 D common stock 2015-12-31 4 F false 431 114.14 D 805 D Stock Option RTB 03172014 66.96 2015-12-31 4 M false 455 0 D 2014-12-31 2024-03-17 common stock 5990 5535 D Stock Option RTB 02232015 66.19 2015-12-31 4 M false 588 0 D 2015-12-31 2025-02-23 common stock 2354 1766 D This option was granted on March 17, 2014 and becomes exercisable in four equal installments on the first four anniversaries of December 31, 2013. This option was granted on February 23, 2015 and becomes exercisable in four equal installments on the first four anniversaries of December 31, 2014. Holley Y. Franklin 2016-01-04