Segment Information (Summary of Net (Loss) Income by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Summary of net income (loss) by segment
Net (loss) income	$ 4,011	$ (2,070)	$ 8,727	$ (17,452)
Imaging
Summary of net income (loss) by segment
Net (loss) income	21,096	18,612	58,913	56,358
Radiation Oncology
Summary of net income (loss) by segment
Net (loss) income	4,534	2,499	12,602	6,530
Corporate / Other
Summary of net income (loss) by segment
Net (loss) income	$ (21,619)	$ (23,181)	$ (62,788)	$ (80,340)