CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 15,199	$ 6,315
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,417	4,473
Provision for doubtful accounts	6,341	3,940
Non-cash compensation	3,874	4,070
401(k) employer match	2,227	1,737
(Gain) loss on disposal of property and equipment	(16)	360
Deferred income taxes	9,445	4,038
Equity in loss of equity method investments	106	5
Amortization of deferred debt issuance costs	185	185
Return on equity investment	150	362
Changes in operating assets and liabilities, net of impact of acquisitions:
Patient accounts receivable	(12,493)	(27,689)
Other current assets	(3,403)	7,845
Other assets	(990)	(2,775)
Accounts payable	93	9,098
Accrued expenses	1,386	801
Other long-term obligations	576	(521)
Net cash provided by operating activities	27,097	12,244
Cash Flows from Investing Activities:
Proceeds from sale of deferred compensation plan assets	565	230
Purchase of investment	(256)	0
Purchases of property and equipment	(4,385)	(6,702)
Acquisitions of businesses, net of cash acquired	(4,099)	(27,682)
Net cash used in investing activities	(8,175)	(34,154)
Cash Flows from Financing Activities:
Proceeds from issuance of stock upon exercise of stock options and warrants	653	0
Proceeds from issuance of stock to employee stock purchase plan	612	638
Shares withheld upon stock vesting	(758)	0
Tax benefit from stock options exercised and restricted stock vesting	0	159
Non-controlling interest distribution	(42)	0
Proceeds from revolving line of credit	0	40,500
Repayments of revolving line of credit	0	(25,500)
Principal payments of long-term obligations	(1,250)	(1,250)
Purchase of company stock	0	(12,315)
Net cash (used in) provided by financing activities	(785)	2,232
Net increase (decrease) in cash and cash equivalents	18,137	(19,678)
Cash and cash equivalents at beginning of period	30,197	27,502
Cash and cash equivalents at end of period	48,334	7,824
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	706	648
Cash paid for income taxes, net of refunds received	$ 284	$ (7)