Brilliant or retarded?

[hockey1]

UTG+1 is borderline maniac but is hitting, which is tilting most of the rest of the table. I think I should've either raised or folded the turn, but I'm more interested in what you think of the river raise.

Party Poker 15/30 Hold'em (10 handed)

Preflop: Hero is CO with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img]. Hero posts a blind of $15.
<font color="666666">1 fold</font>, <font color="CC3333">UTG+1 raises</font>, UTG+2 calls, <font color="666666">2 folds</font>, MP3 calls, <font color="CC3333">Hero (poster) 3-bets</font>, <font color="666666">3 folds</font>, <font color="CC3333">UTG+1 caps</font>, UTG+2 calls, MP3 calls, Hero calls.

Flop: (17.66 SB) T[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="blue">(4 players)</font>
UTG+1 checks, UTG+2 checks, MP3 checks, Hero checks.

Turn: (8.83 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="blue">(4 players)</font>
<font color="CC3333">UTG+1 bets</font>, UTG+2 calls, MP3 folds, Hero calls.

River: (11.83 BB) 3[img]/images/graemlins/spade.gif[/img] <font color="blue">(3 players)</font>
UTG+1 checks, <font color="CC3333">UTG+2 bets</font>, <font color="CC3333">Hero raises</font>, UTG+1 folds, UTG+2 folds.

Final Pot: 14.83 BB
<font color="green">Main Pot: 13.83 BB, won by Hero.</font>
<font color="green">Pot 2: 1 BB, returned to Hero.</font>