How to read Terminal Services Manager idle time

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http://serverfault.com – I opened Terminal Services Manager today on my Win2k3 server and it shows something like this: User State Idle Time Logon Time Jake Active 1 9/20/2012 Silvia Disconnected 3+00:43 From the help docs, idle time: Displays the number of minutes that have elapsed since the last keyboard or mouse input from a session. OK, Jake has been idle for 1 minute, makes sense. But "3+00:43" to me does not compute. What does this mean? How long has Silvia been idle? Bonus question: Why is logon time empty for Silvia? Sure she's disconnected (HowTos)