Fair Value Measurements - Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended |
|---|---|---|
Mar. 31, 2018 |
Jun. 30, 2018 |
|
| Restructuring Reserve [Roll Forward] | ||
| Contingent consideration liability recorded in connection with Town & Country acquisition | $ 500 | $ 187 |
| Accretion of contingent consideration liability | 232 | |
| Fair Value, Measurements, Recurring | ||
| Restructuring Reserve [Roll Forward] | ||
| Beginning balance - December 31, 2016 | 0 | 0 |
| Ending balance - September 30, 2017 | 913 | |
| Level 3 | Fair Value, Measurements, Recurring | ||
| Restructuring Reserve [Roll Forward] | ||
| Beginning balance - December 31, 2016 | $ 0 | 0 |
| Contingent consideration liability recorded in connection with Town & Country acquisition | 894 | |
| Accretion of contingent consideration liability | 19 | |
| Ending balance - September 30, 2017 | $ 913 |