CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014
Cash Flows from Operating Activities:
Net income	$ 78,312		$ 56,711
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of discontinued operations, net of income taxes	(25,703)		0
Depreciation and amortization	35,495		28,089
Stock-based compensation	15,244		11,891
Provision for Doubtful Accounts	7,491		4,873
Write off of Deferred Debt Issuance Cost	3,751		0
Gross excess tax benefits from stock-based compensation	(3,330)		(3,899)
Fair value adjustment for contingent consideration	1,408		0
Workers’ compensation and medical malpractice provision	1,623		3,242
Other	2,717		1,093
Changes in operating assets and liabilities:
Accounts receivable	(54,713)		(40,333)
Prepaid expenses and income taxes	6,583		1,982
Accounts payable	(1,056)		(1,826)
Accrued payroll and contract professional pay	25,451		14,812
Income taxes payable	(4,084)		(1,907)
Workers’ compensation and medical malpractice loss reserves	(701)		(1,384)
Other	(1,191)		(5,386)
Net cash provided by operating activities	87,297		67,958
Cash Flows from Investing Activities:
Cash paid for property and equipment	(18,177)		(14,260)
Cash received from sale of discontinued operations, net	115,440		0
Payments to Acquire Businesses, Net of Cash Acquired	(552,794)		48
Other	16		477
Net cash used in investing activities	(455,515)		(13,735)
Cash Flows from Financing Activities:
Principal payments of long-term debt	(486,125)		(139,125)
Proceeds from long-term debt	875,000		143,000
Proceeds from option exercises and employee stock purchase plan	6,398		6,143
Payment of employment taxes related to release of restricted stock awards	(6,600)		(5,521)
Gross excess tax benefits from stock-based compensation	3,330		3,899
Repurchase of common stock	(1,646)		(68,235)
Debt issuance or amendment costs	(23,890)		(447)
Payments of accrued earn-outs	0		(691)
Net cash provided by (used in) financing activities	366,467		(60,977)
Effect of exchange rate changes on cash and cash equivalents	(1,047)		(715)
Net Increase (Decrease) in Cash and Cash Equivalents	(2,798)		(7,469)
Cash and Cash Equivalents at Beginning of Year	31,714	[1]	37,350
Cash and Cash Equivalents at End of Period	28,916		29,881
Supplemental Disclosure of Cash Flow Information:
Income taxes	30,595		42,670
Interest	14,741		8,690
Supplemental Disclosure of Non-Cash Transactions:
Acquisition of property and equipment through accounts payable	$ 1,245		$ 1,301

[1] Cash and cash equivalents at December 31, 2014 include $2.9 million from the Physician Segment (see "Note 4. Discontinued Operations").