Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Excess tax benefit - stock options	$ 5,256	$ 0	$ 0
Cash flow from operating activities:
Net income	63,158	48,786	41,542
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, Depletion and Amortization	66,172	65,480	60,320
Stock-based compensation	11,131	10,162	7,017
Loss (gain) on disposal of assets	(1,119)	(289)	719
Deferred income taxes	9,754	14,462	11,168
Impairment charges	1,150	4,245	6,513
Provision for losses on receivables, net	818	1,783	2,566
Changes in assets and liabilities, net of effects from acquisitions:
Accounts receivable	20,083	142,051	20,873
Prepaid expenses and other current assets	1,593	1,719	1,746
Other assets	5,460	8,564	11,510
Accounts payable	20,202	(4,786)	3,908
Deferred revenue	35,940	55,792	8,567
Other current liabilities	63,303	(37,741)	52,354
Long-term income taxes payable, net of long-term income taxes receivable	6,702	16,169	15,165
Other liabilities	1,652	5,162	5,760
Net cash (used in) provided by operating activities	234,457	(1,455)	157,696
Cash flow from investing activities:
Purchases of marketable securities	(53,647)	0	(13,724)
Proceeds from sale of marketable securities	51,529	13,058	0
Purchases of property and equipment	(74,403)	(60,153)	(78,959)
Acquisition of businesses	0	0	(32)
Proceeds from Sale of Productive Assets	0	1,394	394
Net cash used in investing activities	(76,521)	(45,701)	(92,321)
Cash flow from financing activities:
Proceeds from issuance of common stock	12,120	7,686	6,817
Borrowings under lines of credit	268,000	440,000	52,000
Repayments under lines of credit	(293,000)	(407,500)	(113,000)
(Repayments) borrowings under long-term debt	943	2,071	2,377
Purchase of non-controlling interests	0	(1,550)	0
Net cash provided by (used in) financing activities	(8,567)	36,565	(56,560)
Effect of Exchange Rate on Cash and Cash Equivalents	(24,846)	4,477	(9,997)
Net (decrease) increase in cash and cash equivalents	124,523	(6,114)	(1,182)
Cash and cash equivalents at beginning of year	89,056
Cash and cash equivalents at end of year	213,579	89,056
Supplemental disclosures of cash flow information
Interest paid	10,802	17,535	14,942
Income taxes, net of refunds	$ 9,709	$ 31,947	$ 21,599