Limbacher undershot the mark. IDC is the Arkansas Industrial Development Corporation -- and the scandal was far bigger than Castle Grande (which was only one of its component scandals).
The IDC issued development bonds, which were brokered thru a Clinton crony (since indicted and imprisoned for drug-dealing and white slavery) and used to fund fraudulent schemes and, at the same time, launder drug money.
Yes, there is a Mena connection...