Acquisitions (Narrative) (Details) $ in Thousands		3 Months Ended	6 Months Ended
	Jun. 15, 2017 USD ($) entity	Mar. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)
Business Acquisition [Line Items]
Acquisition of a business, net of cash acquired			$ 14,529
Two Software Companies [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Jun. 15, 2017
Business Combination, Consideration Transferred	$ 15,000
Acquisition of a business, net of cash acquired	$ 12,000
Number of businesses acquired | entity	2
Business Combination, Contingent Consideration, Term For Payment Upon Completion Of Goals	36 months
Contingent payment	$ 3,000
Business Combinations, goodwill	13,100
Reference Laboratory In Austria [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 1,300
Customer Relationships [Member] | Two Software Companies [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	1,200
Technology-Based Intangible Assets [Member] | Two Software Companies [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 700