Significant Accounting Policies - Accounting Pronouncements (Details) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2019 |
Jan. 01, 2019 |
|
| Leases | ||||
| Operating lease liability | $ 3,916 | |||
| ASU 2016-02 | ||||
| Leases | ||||
| Right-of-use assets | $ 4,800 | |||
| Operating lease liability | $ 4,800 | |||
| Pro Forma | ASU 2016-02 | ||||
| Leases | ||||
| Operating lease, expense | $ 8,000 | $ 3,600 | ||