Restructuring Charges - Narrative (Details) (USD $)	3 Months Ended			15 Months Ended		3 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Diagnostic Imaging Initiative [Member]	Mar. 31, 2014 Diagnostic Imaging Initiative [Member]	Mar. 31, 2014 Diagnostic Imaging Initiative [Member] Employee Severance [Member]	Mar. 31, 2014 Facilities Restructuring Initiative [Member]	Jan. 24, 2014 Facilities Restructuring Initiative [Member] sqft	Jan. 23, 2014 Facilities Restructuring Initiative [Member] sqft	Mar. 31, 2014 Facilities Restructuring Initiative [Member] Minimum [Member]	Mar. 31, 2014 Facilities Restructuring Initiative [Member] Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Area of Real Estate Property							47,000	21,300
Restructuring and Related Cost, Expected Cost									$ 500,000	$ 700,000
Estimated employee related restructuring charges				1,800,000	1,600,000	400,000
Restructuring charges	$ 441,000	$ 1,004,000	$ 27,000			$ 414,000