CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows from Operating Activities:
Net income	$ 3,980	$ 13,429
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,679	20,071
Provision for doubtful accounts	8,722	10,621
Non-cash compensation	3,280	4,780
401(k) employer match	4,363	5,040
Loss on disposal of property and equipment	708	848
Gain on sale of care centers	(357)	0
Deferred income taxes	2,959	5,557
Write off intangible assets	2,286	0
Equity in earnings of equity investments	(700)	(701)
Amortization of deferred debt issuance costs	370	788
Return on equity investment	400	625
Changes in operating assets and liabilities, net of impact of acquisitions:
Patient accounts receivable	35,684	(25,722)
Other current assets	(2,878)	411
Other assets	(800)	(545)
Accounts payable	(7,963)	1,457
Accrued expenses	(4,293)	(3,976)
Other long-term obligations	537	(578)
Net cash provided by operating activities	65,977	32,105
Cash Flows from Investing Activities:
Proceeds from sale of deferred compensation plan assets	100	239
Proceeds from the sale of property and equipment	126	590
Purchases of deferred compensation plan assets	(74)	(127)
Purchases of property and equipment	(19,595)	(20,241)
Purchase of Investment	(6,227)	0
Acquisitions of businesses, net of cash acquired	(627)	(8,392)
Proceeds from dispositions of care centers	2,082	0
Net cash used in investing activities	(24,215)	(27,931)
Cash Flows from Financing Activities:
Proceeds from issuance of stock upon exercise of stock options and warrants	113	145
Proceeds from issuance of stock to employee stock purchase plan	1,695	1,978
Non-controlling interest distribution	(93)	(105)
Proceeds from revolving line of credit	25,500	0
Repayments of revolving line of credit	(25,500)	0
Principal payments of long-term obligations	(27,904)	(17,038)
Net cash used in financing activities	(26,189)	(15,020)
Net increase (decrease) in cash and cash equivalents	15,573	(10,846)
Cash and cash equivalents at beginning of period	14,545	48,004
Cash and cash equivalents at end of period	30,118	37,158
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	2,006	3,494
Cash paid for income taxes, net of refunds received	3,135	1,470
Supplemental Disclosures of Non-Cash Financing and Investing Activities
Acquired Noncontrolling Interest	$ 167	$ 0