The Collaborative International Dictionary of English v.0.48:

paternalistic \pa*ter`nal*ist"ic\ adj.
   Benevolent but sometimes intrusive; -- used often of
   governments and the administration of large organizations.
   See paternal government.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

paternalistic
    adj 1: benevolent but sometimes intrusive