Investments in Unconsolidated Affiliates	9 Months Ended
Sep. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Affiliates	Investments in Unconsolidated Affiliates Investments in unconsolidated affiliates in which the Company exerts significant influence but does not control or otherwise consolidate are accounted for using the equity method. Equity method investments are initially recorded at cost, unless such investments are a result of the Company entering into a transaction whereby the Company loses control of a previously controlled entity but retains a noncontrolling interest. Such transactions, which result in the deconsolidation of a previously consolidated entity, are measured at fair value. The fair value measurement utilizes Level 3 inputs, which include unobservable data, to measure the fair value of the retained noncontrolling interest. The fair value determination is generally based on a combination of multiple valuation methods, which can include discounted cash flow, income approach, or market value approach which incorporates estimates of future earnings and market valuation multiples for certain guideline companies. These investments are included as investments in unconsolidated affiliates in the accompanying consolidated balance sheets. The Company’s share of the profits and losses from these investments is reported in equity in earnings of unconsolidated affiliates in the accompanying consolidated statements of earnings. The Company monitors its investments for other-than-temporary impairment by considering factors such as current economic and market conditions and the operating performance of the companies and records reductions in carrying values when necessary. As of September 30, 2016 and December 31, 2015, the Company recorded in the accompanying consolidated balance sheets its investments in unconsolidated affiliates of $111.0 million and $169.2 million, respectively. The Company's net earnings from these investments during the three months ended September 30, 2016 and 2015 were approximately $4.4 million and $4.9 million, respectively, and during the nine months ended September 30, 2016 and 2015 were approximately $18.4 million and $11.6 million, respectively. During the nine months ended September 30, 2016, the Company's ambulatory services segment sold a portion of its interest in one surgery center, which resulted in the surgery center being deconsolidated and accounted for as an equity method investment. During the nine months ended September 30, 2015, the Company's ambulatory services segment entered into two separate equity method investments. As a result of these investments, the Company contributed its controlling interest in three centers in exchange for noncontrolling interests in the new investments. Each of these investments is jointly owned by a health system and the Company. The newly formed investments (including the contributed centers) are controlled by the health systems. Also, as part of these transactions, the Company obtained a non-controlling interest in one additional center and one surgical hospital which were contributed by the health systems. During the three months ended September 30, 2016, the Company's physician services segment consolidated an entity previously accounted for as an equity method investment due to the Company having the power to direct the activities that most significantly impact economic performance. During the nine months ended September 30, 2015, the Company contributed two sites of service into an entity jointly owned by the Company and a health system. There was no deconsolidation activity for the physician services segment during the nine months ended September 30, 2016. As a result of these transactions, the Company recorded in the accompanying consolidated balance sheets, as a component of investments in unconsolidated affiliates, the fair value of the Company's investment in these entities of approximately $1.8 million and $26.9 million during the nine months ended September 30, 2016 and 2015, respectively. In each of these transactions, the gain or loss on deconsolidation was determined based on the difference between the fair value of the Company’s interest, which was based on estimates of the expected future earnings, in the new entity and the carrying value of both the tangible and intangible assets of the contributed centers immediately prior to each transaction. During the three and nine months ended September 30, 2016, the Company recognized a net loss on deconsolidation related in the accompanying consolidated statements of earnings of approximately $0.7 million. During the three and nine months ended September 30, 2015, the Company recognized a net gain on deconsolidation in the accompanying consolidated statements of earnings of approximately $9.1 million and $5.9 million, respectively.

Investments in Unconsolidated Affiliates

Investments in unconsolidated affiliates in which the Company exerts significant influence but does not control or otherwise consolidate are accounted for using the equity method. Equity method investments are initially recorded at cost, unless such investments are a result of the Company entering into a transaction whereby the Company loses control of a previously controlled entity but retains a noncontrolling interest. Such transactions, which result in the deconsolidation of a previously consolidated entity, are measured at fair value. The fair value measurement utilizes Level 3 inputs, which include unobservable data, to measure the fair value of the retained noncontrolling interest. The fair value determination is generally based on a combination of multiple valuation methods, which can include discounted cash flow, income approach, or market value approach which incorporates estimates of future earnings and market valuation multiples for certain guideline companies. These investments are included as investments in unconsolidated affiliates in the accompanying consolidated balance sheets. The Company’s share of the profits and losses from these investments is reported in equity in earnings of unconsolidated affiliates in the accompanying consolidated statements of earnings. The Company monitors its investments for other-than-temporary impairment by considering factors such as current economic and market conditions and the operating performance of the companies and records reductions in carrying values when necessary.

As of September 30, 2016 and December 31, 2015, the Company recorded in the accompanying consolidated balance sheets its investments in unconsolidated affiliates of $111.0 million and $169.2 million, respectively. The Company's net earnings from these investments during the three months ended September 30, 2016 and 2015 were approximately $4.4 million and $4.9 million, respectively, and during the nine months ended September 30, 2016 and 2015 were approximately $18.4 million and $11.6 million, respectively.

During the nine months ended September 30, 2016, the Company's ambulatory services segment sold a portion of its interest in one surgery center, which resulted in the surgery center being deconsolidated and accounted for as an equity method investment. During the nine months ended September 30, 2015, the Company's ambulatory services segment entered into two separate equity method investments. As a result of these investments, the Company contributed its controlling interest in three centers in exchange for noncontrolling interests in the new investments. Each of these investments is jointly owned by a health system and the Company. The newly formed investments (including the contributed centers) are controlled by the health systems. Also, as part of these transactions, the Company obtained a non-controlling interest in one additional center and one surgical hospital which were contributed by the health systems.

During the three months ended September 30, 2016, the Company's physician services segment consolidated an entity previously accounted for as an equity method investment due to the Company having the power to direct the activities that most significantly impact economic performance. During the nine months ended September 30, 2015, the Company contributed two sites of service into an entity jointly owned by the Company and a health system. There was no deconsolidation activity for the physician services segment during the nine months ended September 30, 2016.

As a result of these transactions, the Company recorded in the accompanying consolidated balance sheets, as a component of investments in unconsolidated affiliates, the fair value of the Company's investment in these entities of approximately $1.8 million and $26.9 million during the nine months ended September 30, 2016 and 2015, respectively. In each of these transactions, the gain or loss on deconsolidation was determined based on the difference between the fair value of the Company’s interest, which was based on estimates of the expected future earnings, in the new entity and the carrying value of both the tangible and intangible assets of the contributed centers immediately prior to each transaction. During the three and nine months ended September 30, 2016, the Company recognized a net loss on deconsolidation related in the accompanying consolidated statements of earnings of approximately $0.7 million. During the three and nine months ended September 30, 2015, the Company recognized a net gain on deconsolidation in the accompanying consolidated statements of earnings of approximately $9.1 million and $5.9 million, respectively.