WRONG RWY APCH LNDG IN A NIGHT OP.

Narrative

CLRED FOR A VISUAL APCH RWY 31R; I ENTERED R DOWNWIND FOR RWY 31R. I WAS CLRED TO LAND RWY 31R AND WAS KEEPING MY SPD UP TO MAKE GOOD TIME; BUT WAS NOT RUNNING LATE. I WAS TURNING R BASE FOR RWY 31R AND WHILE PUTTING APCH FLAPS (15 DEGS) IN AND GEAR DOWN; I WAS ENSURING I HAD 3 GREEN LIGHTS FOR GEAR DOWN AND LOCKED AND BY THE TIME I LOOKED UP AGAIN; I MUST HAVE ALREADY PASSED RWY 31R AND SAW RWY 31L; ASSUMING IT WAS RWY 31R. I LANDED AND THEN REALIZED I HAD LANDED ON THE L RWY. AFTER CLRING THE RWY; I ONLY REQUESTED TO TAXI TO THE RAMP. TWR SAID 'TAXI TO THE RAMP THIS FREQ; HAVE A GOOD NIGHT.' I FEEL CONTRIBUTING FACTORS WERE THAT I WAS ABOUT 30 KTS TOO FAST ON THE BASE LEG; THEREFORE BLOWING PAST MY CLRED RWY; AND I FAILED TO ENSURE MY LOC NEEDLE WAS CTRED WHILE ON FINAL APCH. I HAD IT TUNED TO RWY 31R; BUT DIDN'T LOOK AT IT WHILE MISTAKENLY ON FINAL FOR RWY 31L. I ALSO FAILED TO ENSURE THAT THE RWY NUMBERS SAID RWY 31R. I DISCOVERED I LANDED ON THE WRONG RWY DURING THE LANDING ROLL-OUT WHEN I WAS LOOKING TO THE R FOR THE FBO I PARK AT; BUT ONLY SAW THE AIRLINE TERMINAL INSTEAD.