Termial gravity is dependent on alot of factors like yeast strain AA%, OG, mash temp, grist bill (unfermentables), fermentation health and some other related factors. Session beers are best in the 1.008-1.012 range whereas bigger beers can finish higher around 1.016-1.028 range and higher depending on OG and AA%.
I like most af my lagers (Helles,Ofest,etc...) to finish in the 1.010+/- range.