Look at FAR 61.51 and what is required for an official logbook. The one line entries are not sufficient to meet the requirement as an official logbook, but you may not need it depending on the employer and what they require. Note that you are not required to log all of the time that you have flown. You just need to log the time required for a particular rating, certification, or other as required by FAR.
So, I would hope that the last 5-6 years would be sufficient for any non-airline job. Especially if you can show that you worked for airlines for the last 20+ years.