Auction Rate Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Jun. 25, 2011
Failed ARS investments
Estimated Fair Value	$ 316,772	$ 269,842
Auction Rate Securities [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	27,350	37,500
Other-than-temporary Impairment in Retained Earnings	(14,027)	(14,144)
Investment Securities at New Cost Basis	13,323	23,356
Unrealized Gain/ (Loss)	1,998	2,520
Estimated Fair Value	15,321	25,876
Auction Rate Securities [Member] | Student loans [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	6,850	9,150
Other-than-temporary Impairment in Retained Earnings	(179)	(242)
Investment Securities at New Cost Basis	6,671	8,908
Unrealized Gain/ (Loss)	(231)	(249)
Estimated Fair Value	6,440	8,659
Auction Rate Securities [Member] | Closed end municipal funds [Member]
Failed ARS investments
Investment Securities at Original Cost Basis		7,850
Other-than-temporary Impairment in Retained Earnings		(54)
Investment Securities at New Cost Basis		7,796
Unrealized Gain/ (Loss)		(467)
Estimated Fair Value		7,329
Auction Rate Securities [Member] | Credit linked notes [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	13,500	13,500
Other-than-temporary Impairment in Retained Earnings	(8,765)	(8,765)
Investment Securities at New Cost Basis	4,735	4,735
Unrealized Gain/ (Loss)	2,276	3,291
Estimated Fair Value	7,011	8,026
Auction Rate Securities [Member] | Preferred stock [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	5,000	5,000
Other-than-temporary Impairment in Retained Earnings	(5,000)	(5,000)
Auction Rate Securities [Member] | Municipals [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	2,000	2,000
Other-than-temporary Impairment in Retained Earnings	(83)	(83)
Investment Securities at New Cost Basis	1,917	1,917
Unrealized Gain/ (Loss)	(47)	(55)
Estimated Fair Value	$ 1,870	$ 1,862