Intangible Assets, net - Amortization of Referral Relationships and Non-Competition Agreements (Details) $ in Thousands |
Dec. 31, 2016
USD ($)
|
|---|---|
| Referral Relationships [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| 2017 | $ 1,682 |
| 2018 | 1,636 |
| 2019 | 1,547 |
| 2020 | 1,547 |
| 2021 | 1,547 |
| 2022 | 1,498 |
| 2023 | 1,391 |
| 2024 | 1,272 |
| 2025 | 1,166 |
| 2026 | 704 |
| 2027 | 544 |
| 2028 | 281 |
| 2029 | 44 |
| Non-compete Agreements [Member] | |
| Finite-Lived Intangible Assets [Line Items] | |
| 2017 | 581 |
| 2018 | 525 |
| 2019 | 452 |
| 2020 | 239 |
| 2021 | 162 |
| 2022 | $ 8 |