CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 184,841	$ 79,083
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	35,846	36,195
Amortization of deferred financing costs	2,212	2,252
Loss on disposal of fixed assets		975
Stock-based compensation expense	12,389	10,557
Deferred income taxes	(83,212)	5,081
Equity in earnings of unconsolidated ventures		(103)
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable, net	7,367	71,080
Prepaid expenses and other assets	(10,107)	1,649
Accounts payable and other accrued expenses	15,190	(58,873)
Accrued compensation and benefits	(11,126)	(15,339)
Income taxes payable and receivable	(3,796)	(391)
Supplemental retirement savings plan obligations and other long-term liabilities	6,157	3,184
Net cash provided by operating activities	155,761	135,350
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(22,013)	(21,826)
Cash paid for business acquisitions, net of cash acquired	(45,565)	(5,605)
Proceeds from net working capital refund of acquired business		13,619
Proceeds from equity method investments		4,681
Other	(183)	1,051
Net cash (used in) investing activities	(67,761)	(8,080)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings under bank credit facilities	256,500	240,500
Principal payments made under bank credit facilities	(338,483)	(338,991)
Payment of contingent consideration	(3,630)
Proceeds from employee stock purchase plans	2,459	2,262
Repurchases of common stock	(2,463)	(2,243)
Payment of taxes for equity transactions	(12,656)	(3,632)
Net cash used in financing activities	(98,273)	(102,104)
Effect of exchange rate changes on cash and cash equivalents	1,062	(1,598)
Net (decrease) increase in cash and cash equivalents	(9,211)	23,568
Cash and cash equivalents, beginning of period	65,539	49,082
Cash and cash equivalents, end of period	56,328	72,650
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for income taxes, net of refunds	35,264	41,273
Cash paid during the period for interest	20,505	22,512
Non-cash financing and investing activities:
Accrued capital expenditures	$ 3,316	$ 1,482