Segment Information (Textual) (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
Segment Reporting Information [Line Items]
Number of operating segments (segment)			2
Number of reportable segments (segment)			2
Imaging
Segment Reporting Information [Line Items]
Payments to Acquire Productive Assets	$ 6,331	$ 8,032	$ 13,159	$ 13,513
Radiation Oncology
Segment Reporting Information [Line Items]
Payments to Acquire Productive Assets	3,051	91	3,070	762
Corporate / Other
Segment Reporting Information [Line Items]
Payments to Acquire Productive Assets	$ 556	$ 616	$ 6,965	$ 4,821