Fair Value Of Financial Instruments (Summary Of Fair Value Hierarchy) (Detail) (USD $)	Jun. 30, 2013	Jun. 29, 2012	Jul. 29, 2011
Loans measured at fair value	$ 13,757,000	$ 0
Securities sold, not yet purchased, at fair value	134,735,000	70,155,000
Warrants	24,197,000	27,810,000	24,136,000
Assets segregated for regulatory purposes		10,114,000
Fair Value, Measurements, Recurring [Member]
Loans measured at fair value	13,757,000
Securities owned, at fair value	209,633,000	231,151,000
Securities available for sale	503,276,000	307,789,000
Interest Rate Swaps	1,934,000
Securities sold, not yet purchased, at fair value	134,735,000	70,155,000
Warrants	24,197,000	27,810,000
Net assets (liabilities)	569,668,000	451,089,000
Assets segregated for regulatory purposes		10,114,000
Loans Measured At Fair Value [Member] | Fair Value, Measurements, Recurring [Member]
Loans measured at fair value	13,757,000
Corporate Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	1,520,000	1,312,000
Municipal Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	30,116,000	117,868,000
Securities available for sale	28,224,000	2,936,000
Securities sold, not yet purchased, at fair value	10,000
U.S. Government And Government Agency Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	41,529,000	41,329,000
Securities available for sale	474,906,000	301,071,000
Securities sold, not yet purchased, at fair value	54,086,000	30,462,000
Corporate Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	127,899,000	59,092,000
Securities sold, not yet purchased, at fair value	80,639,000	39,348,000
Other [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	8,569,000	11,550,000
Securities sold, not yet purchased, at fair value		345,000
Westwood Common Stock [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	146,000	157,000
Interest Rate Swaps [Member] | Fair Value, Measurements, Recurring [Member]
Interest Rate Swaps	1,934,000
Warrants [Member] | Fair Value, Measurements, Recurring [Member]
Warrants	24,197,000	27,810,000
U.S. Government Guaranteed Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets segregated for regulatory purposes		10,114,000
USHS Common Stock [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale		3,625,000
SWS Group, Inc
Warrants	24,197,000	27,810,000
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	4,887,000	7,905,000
Securities available for sale	146,000	3,782,000
Securities sold, not yet purchased, at fair value	45,415,000	16,825,000
Net assets (liabilities)	(40,382,000)	4,976,000
Assets segregated for regulatory purposes		10,114,000
Level 1 [Member] | Corporate Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	895,000	637,000
Level 1 [Member] | U.S. Government And Government Agency Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	3,300,000	6,577,000
Securities sold, not yet purchased, at fair value	45,415,000	16,825,000
Level 1 [Member] | Other [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	692,000	691,000
Level 1 [Member] | Westwood Common Stock [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	146,000	157,000
Level 1 [Member] | U.S. Government Guaranteed Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets segregated for regulatory purposes		10,114,000
Level 1 [Member] | USHS Common Stock [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale		3,625,000
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Loans measured at fair value	13,757,000
Securities owned, at fair value	204,001,000	201,565,000
Securities available for sale	503,130,000	304,007,000
Interest Rate Swaps	1,934,000
Securities sold, not yet purchased, at fair value	89,320,000	53,330,000
Net assets (liabilities)	633,502,000	452,242,000
Level 2 [Member] | Loans Measured At Fair Value [Member] | Fair Value, Measurements, Recurring [Member]
Loans measured at fair value	13,757,000
Level 2 [Member] | Municipal Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	30,116,000	96,862,000
Securities available for sale	28,224,000	2,936,000
Securities sold, not yet purchased, at fair value	10,000
Level 2 [Member] | U.S. Government And Government Agency Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	38,229,000	34,752,000
Securities available for sale	474,906,000	301,071,000
Securities sold, not yet purchased, at fair value	8,671,000	13,637,000
Level 2 [Member] | Corporate Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	127,779,000	59,092,000
Securities sold, not yet purchased, at fair value	80,639,000	39,348,000
Level 2 [Member] | Other [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	7,877,000	10,859,000
Securities sold, not yet purchased, at fair value		345,000
Level 2 [Member] | Interest Rate Swaps [Member] | Fair Value, Measurements, Recurring [Member]
Interest Rate Swaps	1,934,000
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	745,000	21,681,000
Warrants	24,197,000	27,810,000
Net assets (liabilities)	(23,452,000)	(6,129,000)
Level 3 [Member] | Corporate Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	625,000	675,000
Level 3 [Member] | Municipal Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value		21,006,000
Level 3 [Member] | Corporate Obligations [Member]
Securities owned, at fair value	120,000
Level 3 [Member] | Corporate Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Securities owned, at fair value	120,000
Level 3 [Member] | Warrants [Member]
Warrants	24,197,000
Level 3 [Member] | Warrants [Member] | Fair Value, Measurements, Recurring [Member]
Warrants	$ 24,197,000	$ 27,810,000