Significant Accounting Policies - Schedule of Revenues by Sources (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) surgical_facility	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Increase of revenue as result of changes in estimates to third-party settlements									$ 2,300
Decrease of revenue as result of changes in estimates to third-party settlements										$ 104
Number of surgical facilities related to revenue adjustment | surgical_facility									2
Total net revenues	$ 263,322	$ 239,599	$ 232,827	$ 224,143	$ 179,691	$ 76,303	$ 76,815	$ 70,480	$ 959,891	403,289	$ 284,599
Healthcare Organization, Patient Service
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Patient service revenues									$ 940,711	$ 388,073	$ 268,681
Healthcare Organization, Patient Service | Customer | Revenue
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue by service type as a percentage of total revenues									100.00%	100.00%	100.00%
Optical Services
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Other service revenues									$ 14,572	$ 14,193	$ 15,918
Other
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Other service revenues									4,608	1,023	0
Private insurance | Healthcare Organization, Patient Service
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Patient service revenues									$ 516,739	$ 202,172	$ 162,888
Private insurance | Healthcare Organization, Patient Service | Customer | Revenue
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue by service type as a percentage of total revenues									55.00%	52.10%	60.60%
Government | Healthcare Organization, Patient Service
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Patient service revenues									$ 359,471	$ 134,041	$ 75,125
Government | Healthcare Organization, Patient Service | Customer | Revenue
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue by service type as a percentage of total revenues									38.20%	34.50%	28.00%
Self-pay | Healthcare Organization, Patient Service
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Patient service revenues									$ 16,190	$ 13,645	$ 7,587
Self-pay | Healthcare Organization, Patient Service | Customer | Revenue
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue by service type as a percentage of total revenues									1.70%	3.50%	2.80%
Other | Healthcare Organization, Patient Service
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Patient service revenues									$ 48,311	$ 38,215	$ 23,081
Other | Healthcare Organization, Patient Service | Customer | Revenue
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue by service type as a percentage of total revenues									5.10%	9.90%	8.60%