Auction Rate Securities (Details) (Auction Rate Securities [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Jun. 30, 2011
Failed ARS investments
Investment Securities at Original Cost Basis	$ 29,600	$ 37,500
Cumulative Other than temporary Impairment Included in retained earnings	(14,045)	(14,144)
Investment Securities at New Cost Basis	15,555	23,356
Unrealized Gain/(Loss)	2,533	2,520
total	18,088	25,876
Student Loans [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	6,850	9,150
Cumulative Other than temporary Impairment Included in retained earnings	(179)	(242)
Investment Securities at New Cost Basis	6,671	8,908
Unrealized Gain/(Loss)	(233)	(249)
total	6,438	8,659
Closed end municipal funds [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	2,250	7,850
Cumulative Other than temporary Impairment Included in retained earnings	(18)	(54)
Investment Securities at New Cost Basis	2,232	7,796
Unrealized Gain/(Loss)	(124)	(467)
total	2,108	7,329
Credit Linked Notes [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	13,500	13,500
Cumulative Other than temporary Impairment Included in retained earnings	(8,765)	(8,765)
Investment Securities at New Cost Basis	4,735	4,735
Unrealized Gain/(Loss)	2,935	3,291
total	7,670	8,026
Preferred Stock [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	5,000	5,000
Cumulative Other than temporary Impairment Included in retained earnings	(5,000)	(5,000)
Municipals [Member]
Failed ARS investments
Investment Securities at Original Cost Basis	2,000	2,000
Cumulative Other than temporary Impairment Included in retained earnings	(83)	(83)
Investment Securities at New Cost Basis	1,917	1,917
Unrealized Gain/(Loss)	(45)	(55)
total	$ 1,872	$ 1,862