CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities:
Net income	$ 23,401	$ 7,978
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	4,202	3,293
Operating Lease Right of Use Amortization	7,399	0
Stock-based compensation expense	1,804	1,601
Deferred income taxes	1,578	(1,926)
Gain (loss) on disposal of assets	56	(187)
Impairment of intangibles and other	6,319	0
Changes in operating assets and liabilities, net of acquisitions:
Receivables	(16,284)	(7,111)
Prepaid expenses and other assets	470	3,881
Prepaid income taxes	1,883	2,458
Accounts payable and accrued expenses	471	24,859
Income taxes payable	184
Net amounts due to/from governmental entities	(55)	(1,011)
Net cash provided by operating activities	31,428	33,835
Investing activities:
Purchases of property, building and equipment	(2,801)	(2,551)
Cash payments for business combinations	(1,413)	(2,770)
Net cash used in investing activities	(4,214)	(5,321)
Financing activities:
Proceeds from line of credit	17,000	13,000
Payments on line of credit	(13,000)	(32,000)
Proceeds from employee stock purchase plan	478	332
Payments on debt	(7,650)	(64)
Noncontrolling interest distributions	(9,194)	(3,086)
Withholding taxes paid on stock-based compensation	(7,577)	(3,467)
Purchase of additional controlling interest	(18,000)	(55)
Exercise of options	(114)
Sale of noncontrolling interest	0	3,322
Net cash (used in) financing activities	(38,057)	(22,018)
Change in cash	(10,843)	6,496
Cash at beginning of period	49,363	2,849
Cash at beginning of period	38,520	9,345
Supplemental disclosures of cash flow information:
Interest paid	2,855	1,397
Income taxes paid	318	$ 792
Right-of-use assets obtained in exchange for new operating lease liabilities	91,174
Capital expenditures accrued	$ 4,600