The company has more than 1,800 outlets and 20,000 employees. That’s just the beginning. It’s about to get a lot bigger, especially in key areas like West Palm. Even if you’ve never heard of them, it’s pretty likely that you’ll be a customer of theirs one day. And this is one company that prides itself on thinking inside the box. BloombergBusinessweek takes you inside Service Corporation International – the king of funeral homes.