Some may disagree with me, but when it comes to a résumé I like it, if at all possible, to be condensed to one, or two pages max. I review them when I am hiring staff, and much prefer a single page. I like less fluff and more substance.
I would not describe every hour of community service, but would denote how many hours, and maybe add, "specific list available upon request", or just list the total number of hours, and let interviewers question you about them if they care.
I know folks on these forums make a big deal about community service hours, but I really don't think they are as significant as many assume. Not saying they aren't relevant, but just about everyone graduating HS these days has to have community service hours, and all accademy applicants do. No one really knows what kids do to earn the hours either. More importantly, although I am not certain about USNA, I don't think with USMA or USAFA, service hours are objectively scored in the whole candidate scoring system. MOC 's may pay more attention to that though.