Fair Value Measurements (Fair Value for Level 3 Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 69,484	$ 54,615
Payment of contingent consideration recorded at acquisition date	(1,976)	(275)
Adjustments to contingent consideration		1,466
Interest accretion expense	416	455
Ending balance	67,599	56,336
Foreign Currency Translation Adjustment [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Foreign currency translation adjustment	$ (325)	$ 75