Note 3 - Securities (Detail) - Remaining Contractual Maturity of Securities (USD $) In Thousands	Jun. 30, 2011
Total	$ 1,009,873
Total	76,142
Total	78,485
Amortized Cost [Member]
One year or less	8,301
One year to five years	201,321
Five years to ten years	115,597
After ten years	229,540
CMOs	373,600
Other residential mortgage-backed securities	91,539
Equity securities	2,158
Total	1,022,056
Amortized Cost [Member]
One year or less	7,010
One year to five years	15,137
Five years to ten years	21,468
After ten years	32,527
Total	76,142
Fair Value [Member]
One year or less	7,967
One year to five years	193,222
Five years to ten years	110,947
After ten years	220,305
CMOs	376,702
Other residential mortgage-backed securities	97,805
Equity securities	2,925
Total	1,009,873
Fair Value [Member]
One year or less	7,226
One year to five years	15,603
Five years to ten years	22,129
After ten years	33,527
Total	$ 78,485