Also found this on some ratings analysis site :
truTV's hit series Impractical Jokers is enjoying a spectacular second season. Last night, the series drew its biggest audience yet, with 2,025,000 viewers. In truTV's key demos demos, Impractical Jokers drew an impressive 1,291,000 adults 18-49 and 661,000 men 18-49. Compared to its first season Impractical Jokers is up double digits across the board, with total viewers growing by +36%, adults 18-49 by +49% and men 18-49 by +28%.
Seems like it should be a no-brainer to renew.