Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Cash flow from operating activities:
Net income	$ 95,972	$ 63,158	$ 48,786
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, Depletion and Amortization	73,186	66,172	65,480
Stock-based compensation	11,168	11,131	10,162
Loss (gain) on disposal of assets	(884)	1,119	289
Deferred income taxes	2,830	(9,754)	(14,462)
Asset Impairment Charges	1,071	1,150	4,245
Provision for losses on receivables, net	(346)	818	1,783
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities	5,624	5,256	0
Other Noncash (Income) Expense	1,005	0	0
Changes in assets and liabilities, net of effects from acquisitions:
Billed and unbilled accounts receivable	(51,292)	(20,083)	(142,051)
Prepaid expenses and other current assets	(6,751)	(1,593)	(1,719)
Other assets	(6,693)	(5,460)	(8,564)
Accounts payable	3,955	20,202	(4,786)
Deferred revenue	47,531	35,940	55,792
Accrued expenses and other current liabilities	18,659	63,303	(37,741)
Long-term income taxes payable, net of long-term income taxes receivable	(1,440)	11,958	16,169
Other liabilities	1,468	1,652	5,162
Net cash (used in) provided by operating activities	183,815	234,457	(1,455)
Cash flow from investing activities:
Purchases of marketable securities	(312,403)	(53,647)	0
Proceeds from sale of marketable securities	182,800	51,529	13,058
Proceeds from Collection of Notes Receivable	659	0	0
Payments for (Proceeds from) Other Investing Activities	0	0	0
Purchases of property and equipment	(81,089)	(74,403)	(60,153)
Acquisition of businesses	(97,099)	0	0
Proceeds from Sale of Property, Plant, and Equipment	1,677	0	1,394
Net cash used in investing activities	(305,455)	(76,521)	(45,701)
Cash flow from financing activities:
Proceeds from issuance of common stock	15,271	12,120	7,686
Payments for Repurchase of Common Stock	(195,149)	0	0
Excess tax benefit from stock-based compensation	5,624	5,256	0
Borrowings under lines of credit	795,000	268,000	440,000
Repayments under lines of credit	(577,500)	(293,000)	(407,500)
Proceees under factoring agreement	10,394	0	0
Payments for deferred financing costs	(1,231)	0	0
(Repayments) borrowings under long-term debt	0	(943)	(2,071)
Purchase of non-controlling interests	0	0	(1,550)
Net cash provided by (used in) financing activities	52,409	(8,567)	36,565
Effect of Exchange Rate on Cash and Cash Equivalents	(321)	(24,846)	4,477
Net (decrease) increase in cash and cash equivalents	(69,552)	124,523	(6,114)
Cash and cash equivalents at beginning of year	213,579	89,056	95,170
Cash and cash equivalents at end of year	144,027	213,579	89,056
Supplemental disclosures of cash flow information
Interest paid	9,962	10,802	17,535
Income taxes, net of refunds	$ 37,764	$ 9,709	$ 31,947