Note 3 - Securities (Detail) - Credit-Related CDO Impairment Losses (USD $)	Jun. 30, 2011 No1 [Member] Life ToDate [Member]	Jun. 30, 2011 No2 [Member] Life ToDate [Member]	Jun. 30, 2010 No2 [Member] June302010 [Member]	Jun. 30, 2010 No2 [Member] June302010 [Member]	Jun. 30, 2011 No3 [Member] Life ToDate [Member]	Jun. 30, 2011 No4 [Member] Life ToDate [Member]	Jun. 30, 2010 No4 [Member] June302010 [Member]	Jun. 30, 2011 No5 [Member] Life ToDate [Member]	Jun. 30, 2010 No5 [Member] June302010 [Member]	Jun. 30, 2010 No5 [Member] June302010 [Member]	Jun. 30, 2011 No6 [Member] Life ToDate [Member]	Jun. 30, 2010 No6 [Member] June302010 [Member]	Jun. 30, 2011 No7 [Member] Life ToDate [Member]	Jun. 30, 2011 Total [Member] Life ToDate [Member]	Jun. 30, 2010 Total [Member] June302010 [Member]	Jun. 30, 2010 Total [Member] June302010 [Member]
CDO Impairment Losses	$ 10,360,000	$ 7,343,000	$ 794,000	$ 794,000	$ 1,159,000	$ 1,078,000	$ 684,000	$ 8,570,000	$ 2,091,000	$ 254,000	$ 243,000	$ 242,000	$ 6,750,000	$ 35,503,000	$ 3,811,000	$ 1,048,000