Acquisitions and Divestitures (Details 2) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jan. 31, 2014 Genomics Laboratory LabCorp	Jun. 30, 2014 Genomics Laboratory LabCorp
Divestitures
Proceeds for the amount received and receivable from sale of business					$ 10,400,000
Cash proceeds from sale of business			8,429,000	0		8,400,000
Pre-tax gain on sale of assets	0	0	1,648,000	0		1,600,000
Gain on sale of assets, net of tax						1,000,000
Reduction in goodwill due to divestitures						$ 1,300,000