Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Changes in Level 3 Fair Values (Details)

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Fair Value Measurements - Changes in Level 3 Fair Values (Details) - Level 3 - Contingent Consideration - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 841 $ 4,150
Settlements through cash payments 0 (687)
Net (gain) loss on change in fair value (273) 327
Other changes 0 1
Balance at end of period $ 568 $ 3,791