Sabean and Bochy were signed for 3 years each and will be in the Giants Organization until 2016.
Posey was signed to a 8 year, $169 MM deal. He will be playing Catcher on the Giants until 2019. He is the leader on this team and will continue to be that.
The Giants want to contend for a long time and re-signing these pieces will help them stay within their goal from 2012 and beyond.