Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended																							6 Months Ended			6 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012 Auction Rate Securities [Member]	Jun. 30, 2012 Auction Rate Securities [Member]	Dec. 31, 2011 Auction Rate Securities [Member]	Dec. 29, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member] Senior Notes [Member] Note Agreement [Member]	Jun. 30, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member] Senior Notes [Member] Note Agreement [Member]	Dec. 31, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member] Senior Notes [Member] Note Agreement [Member]	Dec. 29, 2012 Total [Member] Senior Notes [Member] Note Agreement [Member]	Jun. 30, 2012 Total [Member] Senior Notes [Member] Note Agreement [Member]	Dec. 31, 2011 Total [Member] Senior Notes [Member] Note Agreement [Member]	Dec. 29, 2012 Total [Member]	Jun. 30, 2012 Total [Member]	Dec. 31, 2011 Total [Member]	Dec. 29, 2012 Quoted Prices in Acive Markets (Level 1) [Member]	Jun. 30, 2012 Quoted Prices in Acive Markets (Level 1) [Member]	Dec. 31, 2011 Quoted Prices in Acive Markets (Level 1) [Member]	Dec. 29, 2012 Prices With Other Observable Inputs (Level 2) [Member]	Jun. 30, 2012 Prices With Other Observable Inputs (Level 2) [Member]	Dec. 31, 2011 Prices With Other Observable Inputs (Level 2) [Member]	Dec. 29, 2012 Prices With Unobservable Inputs (Level 3) [Member]	Jun. 30, 2012 Prices With Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 Prices With Unobservable Inputs (Level 3) [Member]	Dec. 29, 2012 Prices With Unobservable Inputs (Level 3) [Member] Auction Rate Securities [Member]	Sep. 29, 2012 CanAm Care, LLC. [Member]	Jan. 06, 2012 CanAm Care, LLC. [Member]	Dec. 29, 2012 CanAm Care, LLC. [Member] Prices With Unobservable Inputs (Level 3) [Member]	Jan. 06, 2012 Maximum [Member] CanAm Care, LLC. [Member] Prices With Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Buisness acquisition, contingent consideration, Cash paid																									$ 2,000
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value																					900	2,900
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements																											(2,000)
Business Acquisition, Contingent Consideration, Additional Consideration																												5,000
Assets:
Cash equivalents												376,471	479,548	421,653	376,471	479,548	421,653	0	0	0	0	0	0
Investment securities			7,507	6,470	6,570							7,507	6,470	6,570	0	0	0	0	0	0	7,507	6,470	6,570
Foreign Currency Contract, Asset, Fair Value Disclosure												7,492			0			7,492			0
Funds associated with Israeli post employment benefits												16,059	14,973	15,371	0	0	0	16,059	14,973	15,371	0	0	0
Total												407,529	500,991	443,594	376,471	479,548	421,653	23,551	14,973	15,371	7,507	6,470	6,570
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	1,037	(933)
Liabilities:
Fair value of contingent consideration												900	2,900		0	0		0	0		900	2,900				2,900
Interest rate swap agreements												13,819	14,706	13,433	0	0	0	13,819	14,706	13,433	0	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure													5,567	5,957		0	0		5,567	5,957		0	0
Total												14,719	23,173	19,390	0	0	0	13,819	20,273	19,390	900	2,900	0
Fixed rate long-term debt						965,000	965,000	965,000	1,040,710	1,050,343	1,039,265
Auction Rate Securities, Par Value, Total			18,000
Decrease in fair value of auction rate securities if the discount rate would increase by 100 basis points																								$ 350