@amanda.hinchman-dominguez ^ is another way to handle the details. This code is based on a JavaFX requirement I had to allow multiple details screens so that support people could compare and contrast different records. The title is set to help organize the windows.
I'll add a model in at some point. I'm going to rewrite this with a single ViewModel property 'userSelectedPerson' that can be modified by multiple windows to see how this looks. Probably ought to have some kind of version flag for optimistic locking