Fair Value Measurements - Liability Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Contingent Consideration - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
Beginning balance | $ 10,956 | $ 683 |
Contingent consideration liability recorded as the result of acquisitions | 72,209 | 10,400 |
Fair value adjustments recorded to income during the period | (698) | (66) |
Contingent payments made | (231) | (61) |
Ending balance | $ 82,236 | $ 10,956 |