Lisa had 20 - 5 = <<20-5=15>>15 marbles.
Since Cindy gave 12 marbles, then she only has 20 - 12 = <<20-12=8>>8 marbles left.
Since Lisa received 12 marbles, then Lisa has 15 + 12 = 27 marbles now.
Hence, Lisa has 27 - 8 = <<27-8=19>>19 marbles more than Cindy.
#### 19