Glad you mentioned this one Judge. It's Scorsese's first "big" movie, but often overlooked. And it's not THAT recent. In looking at the box, it looks like 1973 was the release year.
Two great mob films - both great films in general as well -
"The Long Good Friday" and "Sexy Beast".
Both of them have some of the best ensemble film acting ever, and terrific scripts. Both are British.
I recommend getting DVD's, and make sure they are letterboxed (wide screen).
Two of my favorite films - saw "The Long Good Friday" on screen twice.
Saw "Sexy Beast" on DVD at least twice.