Maniac who plays every pot calls from EP, the HJ (relatively tight) limps, I'm in the cut off with AQs (spades) so I raise 3x blinds, maniac calls, HJ calls, flop comes Ad, Kh, 10d, maniac checks, HJ checks, I bet half pot, maniac calls, HJ shoves for additional 5,000 chips (pot is now like 19,000), I call, maniac folds, HJ has AK of clubs, he wins. I have no idea where I went wrong.

HJ has AKS
Hero has AQs
Flop Ad, Kh, 10d