CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 79,083	$ 65,084
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	36,195	29,481
Amortization of deferred financing costs	2,252	1,152
Loss on disposal of fixed assets	975
Stock-based compensation expense	10,557	8,473
Deferred income tax expense	5,081	12,045
Equity in earnings of unconsolidated ventures	(103)	(98)
Changes in operating assets and liabilities, net of effect of business acquisitions:
Accounts receivable, net	71,080	35,216
Prepaid expenses and other assets	1,649	(7,170)
Accounts payable and other accrued expenses	(58,873)	11,870
Accrued compensation and benefits	(15,339)	(16,998)
Income taxes payable and receivable	(391)	(2,768)
Supplemental retirement savings plan obligations and other long-term liabilities	3,184	(647)
Net cash provided by operating activities	135,350	135,640
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(21,826)	(7,642)
Cash paid for business acquisitions, net of cash acquired	(5,605)	(15,578)
Proceeds from net working capital refund of acquired business	13,619
Proceeds from equity method investments	4,681
Other	1,051	(684)
Net cash used in investing activities	(8,080)	(23,904)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings under bank credit facilities	240,500	154,488
Principal payments made under bank credit facilities	(338,991)	(228,982)
Proceeds from employee stock purchase plans	2,262	1,577
Repurchases of common stock	(2,243)	(1,689)
Payment of taxes for equity transactions	(3,632)	(2,560)
Other		451
Net cash used in financing activities	(102,104)	(76,715)
Effect of exchange rate changes on cash and cash equivalents	(1,598)	(1,388)
Net increase in cash and cash equivalents	23,568	33,633
Cash and cash equivalents, beginning of period	49,082	35,364
Cash and cash equivalents, end of year	72,650	68,997
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for income taxes, net of refunds	41,273	28,237
Cash paid during the period for interest	22,512	16,362
Non-cash financing and investing activities:
Accrued capital expenditures	$ 1,482	$ 266