BOISE, Idaho (AP) — The private company that operates Idaho's largest prison has acknowledged it falsified nearly 4,800 hours of staffing records during a seven-month period last year.

Tennessee-based Corrections Corporation of America said Thursday some employees who work at the Idaho Correctional Center forged their hours between May and November 2012. CCA has contracted with the state to operate the prison for more than a decade. Company officials say staff will be disciplined.

The Idaho Department of Correction began investigating CCA's records earlier this year after finding some staffing discrepancies through an audit. State prison officials say they intend to do a separate review of CCA's findings.

In February, a public records request obtained by the Associated Press showed guards listed as working 24, 36 and 48 hours consecutively without time off.