Enlarging logo

I would like to increase the size of the logo on my website but I have not found a way to enlarge it. I have searched the forums and followed the response of inserting the code image into the CSS panel of General Settings but it has not worked.

I inserted the following into my CSS
#logo img { max-height:100%; }

Can you please assist? My website is at the following url:

http://www.alaskahospitalist.com/zzz-newsite/

Thank you