Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net income	$ 41,844	$ 49,873
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation costs	25,663	25,708
Deferred taxes	40	(2,300)
Tax benefit realized from share-based compensation		3,155
Excess tax benefit from share-based compensation	(2,032)	(3,155)
Depreciation of property and equipment	7,978	8,184
Impairment of property, and equipment	1,269
Impairment recovery of investments	(59)	(20)
Changes in operating assets and liabilities:
Accounts receivable, net	(1,685)	3,848
Inventories	875	(13,957)
Prepaid expenses and other current assets	(103)	120
Other assets	1,325	(410)
Accounts payable	2,132	(5,511)
Accrued compensation	(1,741)	373
Income taxes payable	(731)	(3,259)
Other accrued liabilities	4,954	1,836
Net cash provided by operating activities	79,729	64,485
Cash flows from investing activities
Proceeds from sales and maturities of non-current investments	7,860	350
Purchases of property and equipment	(7,825)	(9,623)
Net cash provided by (used in) investing activities	35	(9,273)
Cash flows from financing activities
Purchases of treasury stock	(33,524)	(40,210)
Proceeds from issuance of shares	31,294	20,581
Excess tax benefit from share-based compensation	2,032	3,155
Payroll taxes for deferred stock units	(2,601)	(2,311)
Net cash used in financing activities	(2,799)	(18,785)
Net increase in cash and cash equivalents	76,965	36,427
Cash and cash equivalents at beginning of period	247,153	209,858
Cash and cash equivalents at end of period	324,118	246,285
Supplemental disclosures of cash flow information
Cash paid for income taxes	$ 11,787	$ 9,459