Flopped a King High flush

[BWillie]

Live 3/6

Hero is MP with K [img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/club.gif[/img].
All of the players in on the flop are pretty good players except for the big blind who is rather loose and has rebought 3 times already. The other 3 are not overly aggressive or passive. Probably are slightly winning players.

UTG folds. UTG+1 folds. UTG+2 folds. MP1 calls. Hero raises. MP3 folds. CO calls. Button folds. SB folds. BB calls. MP1 calls.

FLOP (8 SB): 5 [img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/club.gif[/img]

MP1 checks. Hero checks. CO bets. BB folds. MP1 folds. Hero raises. CO folds.

I feel I made a mistake check-raising on the flop. If I would of just called. I could probably of check-raised him on the turn for more money. My intent on the check raise was to get the loose player BB to call/bet and then raise him on the flop because he isn't folding check-raises, and might even call a BB on the turn. Generally speaking, what play here is +EV.