Laptop, docking station, external monitors

I have a Lenovo ThinkPad T460s, its docking station, and two external monitors. What I'd like to end up with is, when my laptop is docked, it can stay closed (and NOT suspended!), the primary display is an external 1920X1080 monitor, and my 4K monitor is secondary. Then, when undocked, it goes back to only using it's primary monitor and will once again suspend when the lid is closed.