CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net income	$ 43,405	$ 53,387
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of discontinued operations, net of income taxes	0	(25,703)
Depreciation and amortization	30,831	19,813
Stock-based compensation	13,458	9,190
Provision for Doubtful Accounts	5,925	4,776
Write-off of loan costs	0	3,751
Gross excess tax benefits from stock-based compensation (2)	(2,478)	(2,640)
Fair value adjustment for contingent consideration	613	512
Workers’ compensation provision	1,062	993
Other	2,013	935
Changes in operating assets and liabilities:
Accounts receivable	(34,559)	(24,401)
Prepaid expenses and income taxes	4,862	7,165
Accounts payable	(3,180)	(158)
Accrued payroll and contract professional pay	29,961	13,293
Income taxes payable	11,054	(10,165)
Workers’ compensation loss reserves	(1,372)	(834)
Other Payments to Acquire Businesses	(1,937)	0
Other	(2,012)	2,506
Net cash provided by operating activities	97,646	52,420
Cash Flows from Investing Activities:
Cash paid for property and equipment	(13,909)	(13,331)
Cash received from sale of discontinued operations, net	6,000	115,440
Payments to Acquire Businesses, Net of Cash Acquired	0	552,794
Other	(350)	(584)
Net cash provided by (used in) investing activities	(8,259)	(451,269)
Cash Flows from Financing Activities:
Principal payments of long-term debt	(72,000)	(440,125)
Proceeds from Issuance of Long-term Debt	7,000	875,000
Proceeds from option exercises and employee stock purchase plan	5,921	3,802
Payment of employment taxes related to release of restricted stock awards	(5,266)	(5,537)
Gross excess tax benefits from stock-based compensation (2)	2,478	2,640
Repurchase of common stock	(2,787)	(1,645)
Debt issuance or amendment costs	0	(23,893)
Payments of Merger Related Costs, Financing Activities	13,814	0
Net cash used in financing activities	(78,468)	410,242
Effect of exchange rate changes on cash and cash equivalents	(6)	(1,244)
Net Increase (Decrease) in Cash and Cash Equivalents	10,913	10,149
Cash and Cash Equivalents at Beginning of Year	23,869	31,714
Cash and Cash Equivalents at End of Period	34,782	41,863
Supplemental Disclosure of Cash Flow Information:
Income taxes	10,855	20,418
Interest	14,297	6,798
Supplemental Disclosure of Non-Cash Transactions:
Acquisition of property and equipment through accounts payable	574	1,627
unsettled repurchases of common stock	$ 802	$ 0