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Fair Value Measurements Fair Value, Reconciliation of Level 3 - Liabilities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Contingent Consideration, Beginning Value $ 1,373 $ 1,983 $ 606
Contingent Consideration, Settlements (716) (716) (424)
Contingent Consideration, Reclass 0 (331) (143)
(Gain) loss, net from changes in fair value of contingent consideration [1] (424) (703) (39)
Contingent Consideration, Ending Value 233 233 4,006
Fair Value, Measurement with Unobservable Inputs, Unrealized Gain Loss [2] $ (857) $ (1,091) $ 0
[1] Changes in the fair value of contingent consideration liabilities are classified within "Acquisition-related expense (benefit), net" on the condensed consolidated statements of operations.
[2] Represents the unrealized losses or gains recorded in earnings and/or other comprehensive income (loss) during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.