See the link
http://sportsillustrated.cnn.com/2008/basketball/ncaa/specials/ncaa_tourney/2008/04/01/bc.bkc.crean.indiana.ap/index.html
"Another source said the contract might extend to 10 years to ensure it outlasts Crean's current deal at Marquette, which runs through the 2016-17 season."
Wow, that says a lot. He is leaving for a contract that might be as long as the one he has here.