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Intangible Assets, net (Details) $ in Thousands | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2016 USD ($) Operation | Sep. 30, 2016 USD ($) | [1] | Jun. 30, 2016 USD ($) | [1] | Mar. 31, 2016 USD ($) | [1] | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | [1] | Jun. 30, 2015 USD ($) | [1] | Mar. 31, 2015 USD ($) | [1] | Dec. 31, 2014 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Total | $ 38,060 | $ 33,389 | $ 33,909 | $ 34,428 | $ 30,296 | [1] | $ 23,798 | $ 24,167 | $ 24,537 |
Number of acquired operations | Operation | 2 |  |  |  |  |  |  |  |  |
Tradenames [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Total | $ 21,234 |  |  |  | 17,660 |  |  |  |  |
Accumulated amortization | $ 0 |  |  |  | 170 |  |  |  |  |
Estimated useful life | 6 years |  |  |  |  |  |  |  |  |
Referral Relationships [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Total | $ 14,859 |  |  |  | 10,866 |  |  |  |  |
Accumulated amortization | $ 5,275 |  |  |  | 3,763 |  |  |  |  |
Referral Relationships [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life | 6 years |  |  |  |  |  |  |  |  |
Referral Relationships [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life | 16 years |  |  |  |  |  |  |  |  |
Referral Relationships [Member] | Physician Services [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Accumulated amortization |  |  |  |  |  |  |  |  |  | $ 156
Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Total | $ 1,967 |  |  |  | 1,770 |  |  |  |  |
Accumulated amortization | $ 3,380 |  |  |  | $ 2,855 |  |  |  |  |
Non-compete Agreements [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life | 5 years |  |  |  |  |  |  |  |  |
Non-compete Agreements [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life | 6 years |  |  |  |  |  |  |  |  |
Non-compete Agreements [Member] | Physician Services [Member] |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Accumulated amortization |  |  |  |  |  |  |  |  |  | $ 270
[1] | as restated

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