American Idol Judges: Getting Fired?

Usually it's the contestants who worry for their future, but it seems the judges over at "American Idol" may all be getting the axe once Season 12 is over.
An inside source claims that Nicki Minaj**, Keith Urban**, Mariah Carey**, and Randy Jackson** will all get their walking papers given the show's dwindling ratings.
"All four are gone. They feel they've lost their core audience and they want it back. No more big checks for divas," stated the snitch.
And the house-cleaning trend doesn't stop at the judges' table- producer Nigel Lythgoe is also said to be getting the boot as well.