Debt (Narrative) (Detail) (USD $)	12 Months Ended		1 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jan. 31, 2012 Yen Loan	Jan. 31, 2012 Yen Revolving Credit Facility	Jun. 30, 2012 Yen Revolving Credit Facility	Jun. 30, 2011 Yen Revolving Credit Facility	Jun. 30, 2012 Minimum	Jan. 31, 2012 Minimum Yen Revolving Credit Facility	Jun. 30, 2012 Maximum	Jan. 31, 2012 Maximum Yen Revolving Credit Facility	Jun. 30, 2012 Singapore Bank	Jun. 30, 2011 Singapore Bank
Debt Disclosure [Line Items]
Credit facility	$ 50,000,000			$ 500,000,000
Line of credit facility, maximum borrowing capacity	80,000,000										400,000	400,000
Line of credit facility interest rate description	The credit facility has a five-year term through June 2016 and has an interest rate of LIBOR, as defined in the agreement, plus 0.625% to 1.50%.			The new Yen denominated line of credit is a 500 million Yen facility that has a five-year term through June 2016 and has an interest rate equal to the LIBOR Rate, as defined in the loan agreement, plus 0.625% to 1.50%.
Line of credit, expiration date	June 2016		June 2012	June 2016
Line of credit, interest rate							0.625%		1.50%		1.00%	1.00%
Line of credit, interest rate in addition to LIBOR Rate					0.625%	0.625%		0.625%		1.50%
Amount Borrowed					300,000,000	300,000,000
Available credit under line of credit facility	42,300,000	34,100,000
Total outstanding letters of credit	900,000	900,000									0	0
Weighted average interest rate of borrowings	1.00%	1.70%									5.25%	5.25%
Weighted average of total borrowings	$ 19,000,000	$ 4,500,000
outstanding long-term debt, maturity date	June 2016