Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Cash flow from operating activities:
Net income	$ 107,300	$ 154,900	$ 147,800
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	106,400	96,900	84,900
Stock-based compensation	22,100	20,100	17,900
Change in fair value	(20,700)	0	0
Deferred income taxes	(14,800)	24,000	(16,100)
Fair value adjustment of contingent consideration	(2,900)	8,700	(7,400)
Excess tax benefit from stock-based compensation	0	(4,200)	(7,100)
Other non-cash items	(700)	(100)	2,100
Changes in assets and liabilities, net of effects from acquisitions:
Billed and unbilled accounts receivable	(23,600)	(122,100)	(24,500)
Prepaid expenses and other current assets	(4,400)	(17,900)	(3,100)
Other assets	1,900	1,600	(11,900)
Accounts payable	38,900	(20,800)	19,000
Deferred revenue	67,800	58,200	(33,700)
Accrued expenses and other current liabilities	(23,600)	32,700	9,700
Long-term income taxes payable, net of long-term income taxes receivable	4,700	21,100	(10,600)
Other liabilities	900	8,200	(9,200)
Net cash provided by operating activities	306,400	261,300	157,800
Cash flow from investing activities:
Proceeds from sale of marketable securities	0	0	88,600
Purchases of property and equipment	(72,600)	(95,500)	(80,200)
Acquisition of businesses	(184,600)	(67,300)	(104,500)
Net cash used in investing activities	(257,200)	(162,800)	(96,100)
Cash flow from financing activities:
Proceeds from issuance of common stock, net of tax payments for cashless exercises	34,200	13,900	12,600
Payments for share repurchase	(200,000)	(200,000)	0
Excess tax benefit from stock-based compensation		4,200	7,100
Borrowings under credit agreement/facility	535,000	1,176,200	429,600
Repayments under credit agreement/facility	(371,600)	(1,028,900)	(422,500)
Borrowings under factoring agreement	6,400	0	0
Payments for contingent consideration		(9,900)	0
Payments for debt issuance costs		(1,000)	(600)
Net cash provided by (used in) financing activities	4,000	(45,500)	26,200
Effect of Exchange Rate on Cash and Cash Equivalents	900	(11,800)	(68,700)
Net increase in cash and cash equivalents	54,100	41,200	19,200
Cash and cash equivalents at beginning of year	248,600	207,400	188,200
Cash and cash equivalents at end of year	302,700	248,600	207,400
Supplemental disclosures of cash flow information
Non-cash capital expenditures	4,500	4,500	6,900
Non-cash debt settlement under factoring agreement	21,200	0	0
Interest	9,600	13,000	10,800
Income taxes, net of refunds	65,400	19,700	78,400
Impairment charges	$ 5,700	$ 0	$ 0