Note 10 - Income Taxes (Details) - Components of Net Deferred Tax Asset (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax asset
Allowance for credit losses	$ 14,309	$ 13,700
State franchise taxes	3,249	4,162
Deferred compensation	7,991	8,278
Real estate owned	2,095	2,211
Purchased assets and assumed liabilities	5,294	4,732
Post-retirement benefits	1,059	1,210
Employee benefit accruals	5,321	5,648
VISA Class B shares	1,554	1,479
Limited partnership investments	1,299	1,037
Impaired capital assets	20,793	20,819
Capital loss carryforward		47
Leases	123
Premises and equipment	690	444
Other	654	64
Subtotal deferred tax asset	64,431	63,831
Total deferred tax asset	64,431	63,831
Net deferred loan fees	383	429
Intangible assets	7,408	9,219
Securities available for sale	3,233	10,741
Leases		752
Other	126	241
Total deferred tax liability	11,150	21,382
Net deferred tax asset	$ 53,281	$ 42,449