Yes, you'll be able to go to the box office and they can print out the paper ticket for you. Just have your order info with you. Since "Doubtfire" is through Telecharge, their ticket orders usually start with the number 8. When I was in NYC in September, I purchased tickets for the reopening performance of "Moulin Rouge." Since they switched from Ticketmaster to SeatGeek, all their internet sales are electronic tickets, scanning your cell phone when you arrive at the theatre.
I don't have a cell phone, so the gal at the box office looked up my order, and printed out the ticket for me that I used to get into the theatre.