Financial Instruments and Fair Value Measurements Estimated Fair Value of Liabilities Measured on a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Fair value measurement at beginning of period	$ 1,212	$ 1,074
Change in fair value measurement included in operating expenses	8	75
Contingent consideration paid or settled	(608)	0
Fair value measurement at end of period	$ 612	$ 1,149