Debt (Narrative) (Detail) (USD $)	12 Months Ended					12 Months Ended		12 Months Ended	0 Months Ended	12 Months Ended			12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Oct. 21, 2011	Jan. 12, 2010	Jun. 30, 2012 Guarantee And Collateral Agreement [Member]	Mar. 31, 2009 Credit Agreement [Member]	Jun. 30, 2012 2009 Credit Agreement [Member]	Dec. 01, 2010 Revolving Credit Facility [Member]	Jun. 30, 2012 Revolving Credit Facility [Member]	Jun. 30, 2011 Revolving Credit Facility [Member]	Dec. 01, 2010 Revolving Credit Facility [Member] Letter of Credit [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2012 Denominator [Member]	Jun. 30, 2012 Numerator [Member]	Jun. 30, 2012 Convertible Senior Notes [Member]	Jun. 30, 2011 Convertible Senior Notes [Member]	Jun. 30, 2010 Convertible Senior Notes [Member]	Jun. 30, 2012 Convertible Senior Notes [Member] Registration Rights Agreement [Member]
Debt Disclosure [Line Items]
Short-term borrowings outstanding	$ 227,000	$ 1,785,000
Lines of credit	17,800,000	20,800,000
Unamortized discounts	5,000,000	21,600,000
Fair value																	395,000,000	383,900,000
Other obligations	52,000	442,000
Interest expense, net	20,126,000	22,576,000	30,215,000
Interest expense, gross	27,000,000	32,500,000	33,800,000
Non-cash interest expense	19,100,000	19,300,000	17,400,000														16,600,000	15,700,000	14,800,000
Cash interest expense, net	7,900,000	13,200,000	16,400,000
Interest income	6,900,000	9,900,000	3,600,000
Cash paid for interest, net of cash interest received	3,100,000	5,000,000	15,000,000
Secured revolving credit facility, period of agreement, in years									5,000,000
Secured revolving credit facility, expiration date									Jan. 15, 2015
Current borrowing capacity									550,000,000
Annual facility fee rate, maximum borrowing capacity							231,600,000	0.010	700,000,000			60,000,000
Revolving Credit Facility interest rate description	Interest rates for borrowings under the Revolving Credit Facility range from 0.875 percent to 1.375 percent above the applicable base rate for base rate loans and range from 1.875 percent to 2.375 percent above the London Interbank Offered Rate (“LIBOR”) for Eurocurrency loans based on our Total Leverage Ratio (as defined below). In addition, we are obligated to pay an annual facility fee on the Aggregate Commitment, whether drawn or undrawn, ranging from 0.375 percent to 0.625 percent based on our Total Leverage Ratio. Any proceeds from borrowings under the Revolving Credit Facility may be used for general corporate purposes.
Line of credit facility interest rate above base rate								3.00%					0.875%	1.375%
Line of credit facility interest rate above LIBOR								4.00%					1.875%	2.375%
Annual facility fee on the Aggregate Commitment													0.375%	0.625%
Interest coverage ratio															3,250,000	1,000,000
Total leverage ratio	4.00 to 1.00
Senior leverage ratio		3.00 to 1.00
Line of credit capitalized fees and expenses										7,000,000
Amount of outstanding letters of credit	8,700,000					8,700,000
Unused available credit	541,300,000
Debt issuance costs											700,000
Debt instrument, maturity date						2015-12-01
Convertible Senior Notes outstanding																	400,000,000
Debt instrument, issuance date	Oct. 23, 2007
Debt instrument, maturity date																	Oct. 15, 2012
Effective interest rate, Convertible Senior Notes	5.60%																1.25%
Initial conversion rate, shares per principal amount																	9.6154
Principal amount of Convertible Senior Notes	1,000																1,000
Initial conversion price per share																	$ 104
Effective interest rate, Convertible Senior Notes	75,700,000
Proceeds received attributed to conversion feature of Convertible Senior Notes	48,300,000
Debt issuance costs for revolving credit facility	0	7,002,000	0														4,800,000
Unamortized balance of debt issuance costs	300,000	1,100,000
Convertible Senior Notes, interest expense	5,000,000	5,000,000	5,000,000
Amortization of discount, Convertible Senior Notes	$ 800,000	$ 800,000	$ 800,000
Percentage of aggregate amount of indebtedness					50.00%
Period of effectiveness of registration statement, maximum																				five years and three months
Possible additional interest rate to be accrued, per annum																				0.25%
Number of business days to file registration statement				7