Fair Value Measurements (Quantitative Information about Unobservable Inputs, Liabilities) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2015	May. 31, 2015	May. 31, 2015	May. 31, 2014
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Payment of contingent consideration			$ 0	$ (210)
Asset impairment		$ 3,900	3,947	$ 0
Modulus [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Change in fair value of contingent consideration		$ (1,100)	$ (1,200)
Modulus [Member] | Contingent Consideration [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Probability milestones associated with contingent consideration will be achieved, Year 1			0.00%
Probability milestones associated with contingent consideration will be achieved, Year 2			40.00%
Contingent consideration, discount rate			33.00%
Subsequent Event [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Payment of contingent consideration	$ (200)