(Summary of Identifiable Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Summary of Company's identifiable assets by segment
Identifiable assets	$ 473,467	$ 489,847
Imaging
Summary of Company's identifiable assets by segment
Identifiable assets	220,496	240,317
Radiation Oncology
Summary of Company's identifiable assets by segment
Identifiable assets	149,587	158,216
Corporate / Other
Summary of Company's identifiable assets by segment
Identifiable assets	$ 103,384	$ 91,314