Financial Instruments, Long-term Debt (Details) (USD $)	3 Months Ended			6 Months Ended							6 Months Ended		6 Months Ended		6 Months Ended		3 Months Ended
	Dec. 31, 2011		Dec. 25, 2010	Dec. 31, 2011		Dec. 25, 2010	Jun. 25, 2011		Dec. 31, 2011 3.45% fixed rate notes due June 2013 [Member]	Jun. 25, 2011 3.45% fixed rate notes due June 2013 [Member]	Dec. 31, 2011 Term fixed rate notes (2.0% 2.5%) due March 2013 to September 2015 [Member]	Jun. 25, 2011 Term fixed rate notes (2.0% 2.5%) due March 2013 to September 2015 [Member]	Dec. 31, 2011 Amortizing fixed rate notes (1.5%-2.75%) due up to June 2014 [Member]	Jun. 25, 2011 Amortizing fixed rate notes (1.5%-2.75%) due up to June 2014 [Member]	Dec. 31, 2011 Amortizing floating rate notes (EURIBOR plus 1.5%) due up to June 2014 [Member]	Jun. 25, 2011 Amortizing floating rate notes (EURIBOR plus 1.5%) due up to June 2014 [Member]	Dec. 31, 2011 Unsecured Revolving Credit Facility [Member] Financing [Member]	Oct. 13, 2011 Unsecured Revolving Credit Facility [Member] Financing [Member]
Debt Instrument [Line Items]
Long-term debt	$ 310,645,000			$ 310,645,000			$ 300,000,000		$ 300,000,000	$ 300,000,000	$ 6,120,000	$ 0	$ 2,215,000	$ 0	$ 2,310,000	$ 0
Long-term debt, current portion	(1,945,000)	[1]		(1,945,000)	[1]		0	[1]
Long-term debt, excluding current portion	308,700,000			308,700,000			300,000,000
Stated interest rate of the notes									3.45%
Minimum stated interest rate of notes											2.00%		1.50%
Maximum stated interest rate of notes											2.50%		2.75%
Floating rate notes, rate basis															EURIBOR
Floating rate notes, EURIBOR plus															1.50%
Effective interest rate of the Notes									3.49%
Interest expense relating to the Notes	2,737,000		2,587,000	5,414,000		5,175,000
Estimated fair value of long-term debt	320,000,000			320,000,000
Unsecured revolving credit facility																		$ 250,000,000
Debt covenant requirement, debt to EBITDA ratio																	3

[1] Current portion of long-term debt is included under accrued expenses in the Condensed Consolidated Balance Sheets.