AK ftw?!

[murmeltier21]

Hey guys!
Not much history with villain. He is 20/13/3 over 40 hands. I just joined the table.
Comment this please. Super standard? What's up with this overbet on the flop?

Party Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $90.00
BB: $100.00
UTG: $100.14
MP: $105.80
CO: $35.70
Hero (BTN): $98.50

Preflop: Hero is dealt A[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (6 Players)
<font color="red">UTG raises to $4.00</font>, MP calls $4.00, CO folds, <font color="red">Hero raises to $18.00</font>, 2 folds, UTG calls $14.00, MP calls $14.00

Flop: ($55.50) A[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] (3 Players)
<font color="red">UTG bets all-in for $82.14</font>, MP folds, Hero calls all-in for $80.50