CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 249,340	$ 119,440
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	53,563	53,898
Amortization of deferred financing costs	3,311	3,371
Loss on disposal of fixed assets		975
Stock-based compensation expense	18,183	16,114
Deferred income taxes	(69,405)	6,773
Equity in earnings of unconsolidated ventures		(167)
Gain on sale of assets		(1,545)
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable, net	(53,410)	62,360
Prepaid expenses and other assets	(11,916)	(3,895)
Accounts payable and other accrued expenses	68,505	(31,706)
Accrued compensation and benefits	(12,047)	(7,013)
Income taxes payable and receivable	(572)	(4,082)
Supplemental retirement savings plan obligations and other long-term liabilities	8,945	1,955
Net cash provided by operating activities	254,497	216,478
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(31,810)	(34,941)
Cash paid for business acquisitions, net of cash acquired	(50,368)	(5,786)
Proceeds from net working capital refund of acquired business		13,619
Proceeds from equity method investments		4,681
Other	(38)	1,597
Net cash (used in) investing activities	(82,216)	(20,830)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings under bank credit facilities	397,000	373,500
Principal payments made under bank credit facilities	(547,974)	(551,974)
Payment of contingent consideration	(11,553)
Proceeds from employee stock purchase plans	3,673	3,334
Repurchases of common stock	(3,802)	(3,367)
Payment of taxes for equity transactions	(20,692)	(10,580)
Net cash used in financing activities	(183,348)	(189,087)
Effect of exchange rate changes on cash and cash equivalents	1,498	(1,272)
Net (decrease) increase in cash and cash equivalents	(9,569)	5,289
Cash and cash equivalents, beginning of period	65,539	49,082
Cash and cash equivalents, end of period	55,970	54,371
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for income taxes, net of refunds	45,771	57,721
Cash paid during the period for interest	30,346	33,916
Non-cash financing and investing activities:
Accrued capital expenditures	$ 818	$ 334