Other Comprehensive Income - Reclassification from accumulated other comprehensive income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 27, 2014	Dec. 28, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest rate swap contracts	$ 1,923	$ 1,566	$ 3,718	$ 3,147
Tax benefit	9,748	9,787	18,435	18,165
Total amounts reclassified, net of tax	16,953	16,343	33,321	29,953
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total amounts reclassified, net of tax	464	364	930	728
Pension benefit liability [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net loss	608	453	1,217	906
Tax benefit	(229)	(170)	(457)	(340)
Total amounts reclassified, net of tax	379	283	760	566
Interest Rate Swap [Member] | Derivative financial instruments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest rate swap contracts	135	134	273	260
Tax benefit	(50)	(53)	(103)	(98)
Total amounts reclassified, net of tax	$ 85	$ 81	$ 170	$ 162