CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cash flows from operating activities      
Net income $ 157,149,000 $ 54,598,000 $ 74,365,000
Loss from discontinued operations 9,355,000 9,330,000 4,895,000
Adjustments to reconcile net income to net cash provided by operating activities      
Provision for doubtful accounts 14,051,000 14,208,000 12,736,000
Depreciation and amortization 52,663,000 41,450,000 39,953,000
Amortization of deferred issuance costs 2,954,000 3,891,000 2,980,000
Impairment of long-lived assets 610,000 0 435,000
Realized (gain) loss on sale of investments (7,633,000) 12,330,000 7,100,000
(Gain) loss on disposal of assets (232,000) 123,000 (307,000)
Equity in net income of nonconsolidated affiliates (32,564,000) (23,364,000) (16,767,000)
Distributions from nonconsolidated affiliates 50,773,000 50,505,000 38,652,000
Deferred income tax 8,556,000 15,410,000 7,385,000
Stock compensation 4,126,000 2,724,000 1,719,000
Change in fair value and loss on de-designation of interest rate swap 485,000 8,314,000  
Loss on extinguishment of debt   10,333,000  
Payment of deferred interest   (14,785,000)  
Debt call premium paid   (5,000,000)  
(Increase) decrease in assets, net of business combinations      
Accounts receivable (18,692,000) (20,000,000) (10,048,000)
Other assets (66,709,000) 8,230,000 (24,314,000)
(Decrease) increase in liabilities, net of business combinations      
Accounts payable 4,709,000 3,679,000 (810,000)
Accrued payroll 2,404,000 6,143,000 (1,138,000)
Accrued interest (213,000) (13,263,000) (560,000)
Other liabilities 34,261,000 9,064,000 33,849,000
Other, net (722,000) (251,000) (1,767,000)
Net cash (used in) provided by operating activities of discontinued operations (4,750,000) (8,085,000) 2,834,000
Net cash provided by operating activities 210,581,000 165,584,000 171,192,000
Cash flows from investing activities      
Capital expenditures (37,304,000) (36,838,000) (28,445,000)
Proceeds from sale of business 2,711,000 1,276,000 10,198,000
Proceeds from sale of investment     4,335,000
Proceeds from disposal of assets 1,302,000 5,880,000 474,000
Proceeds from sale of equity interests of nonconsolidated affiliates 2,344,000 4,587,000 14,980,000
Proceeds from sale of equity interests of consolidated affiliates in deconsolidation transactions 2,375,000 2,069,000 4,251,000
Decrease in cash related to conversion of consolidated affiliates to equity interests (30,000) (116,000) (1,034,000)
Net change in restricted cash 1,062,000 1,886,000 (3,936,000)
Net settlements on interest rate swap (1,539,000) (2,921,000) (6,081,000)
Business acquisitions, net of cash acquired 2014 - $2,527; 2013 - $6,131; 2012 - $4,386 (122,165,000) (54,499,000) (2,796,000)
Purchase of equity interests in nonconsolidated affiliates (36,032,000) (766,000) (14,521,000)
Purchase of equity interests in deconsolidation transaction     (1,576,000)
Return of equity method investments in nonconsolidated affiliates 2,555,000 2,592,000  
Other (3,791,000)    
Net cash provided by investing activities of discontinued operations   16,000 2,347,000
Net cash used in investing activities (188,512,000) (76,834,000) (21,804,000)
Cash flows from financing activities      
Borrowings under line of credit arrangements and long-term debt, net of issuance costs 35,646,000 417,678,000 4,010,000
Payment of debt acquisition costs   (5,700,000)  
Proceeds from issuance of shares pursuant to IPO, net of offering costs   171,877,000  
Principal payments on line of credit arrangements and long-term debt (31,083,000) (527,634,000) (8,865,000)
Principal payments under capital lease obligations (8,225,000) (7,552,000) (6,189,000)
Distributions to noncontrolling interests of consolidated affiliates (113,432,000) (102,975,000) (94,163,000)
Contributions from noncontrolling interests of consolidated affiliates 17,452,000 4,758,000 22,000
Proceeds from sale of equity interests of consolidated affiliates 5,593,000 7,864,000 7,596,000
Repurchase of equity interests of consolidated affiliates (8,726,000) (5,612,000) (6,500,000)
Distributions to unit holders   (74,900,000)  
Proceeds from teammate equity plans 5,820,000 453,000  
Other (2,189,000)    
Net cash provided by financing activities of discontinued operations     2,004,000
Net cash used in financing activities (99,144,000) (121,743,000) (102,085,000)
Change in cash and cash equivalents (77,075,000) (32,993,000) 47,303,000
Cash and cash equivalents at beginning of period 85,829,000 118,618,000 71,212,000
Cash and cash equivalents of discontinued operations at beginning of period 14,000 178,000 169,000
Less: Cash and cash equivalents of discontinued operations at end of period (37,000) 26,000 (66,000)
Cash and cash equivalents at end of period 8,731,000 85,829,000 118,618,000
Supplemental cash flow information      
Cash paid during the year for interest 31,173,000 62,167,000 56,848,000
Cash paid during the year for income taxes 753,000 493,000 475,000
Supplemental schedule of noncash investing and financing activities      
Property and equipment acquired through capital leases and installment purchases 9,722,000 21,329,000 7,714,000
Goodwill attributable to sale of surgery centers 752,000 10,062,000 9,066,000
Net investment in consolidated affiliates that became equity method facilities 1,848,000 5,356,000 712,000
Noncontrolling interest associated with conversion of consolidated affiliates to equity method affiliates 3,886,000 747,000 3,019,000
Contributions (non-cash) from noncontrolling interests of consolidated affiliates 5,225,000    
Accrued capital expenditures at end of period 3,457,000 2,341,000 2,713,000
Conversion of equity method affiliate to consolidated affiliate financed through the issuance of debt     7,221,000
Equity interest purchase in nonconsolidated affiliates via withheld distributions     10,462,000
Debt to equity conversion of nonconsolidated affiliate     $ 5,027,000