Thank you all

I've looked for the subject, but I don't find a comprehensive answer. I've checked Fowler's MEU, but I'm not happy with the answers I find because I don't find the precise point I'm looking for, so I asking for help here.

**May we add "wide" to any noun?** For example, if I want to refer to an organization like a bank, may I write "bankwide", "bank-wide", or "bank wide". Are there any specific rules about it?

Could "at large" be a substitute (depending on context of course)? For example, the document was distributed to the the main office, and the bank at large (or bankwide).

Thank you
lg