Note 6 - Other Assets (Details) - Other Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Other Assets [Abstract]
Federal Reserve Bank stock (1)	$ 14,069	[1]	$ 14,069	[1]
Federal Home Loan Bank stock (2)	940	[2]	4,188	[2]
Other investments	346		376
Total cost method equity investments	15,355		18,633
Life insurance cash surrender value	44,417		43,896
Net deferred tax asset	50,323		53,281
Limited partnership investments	17,643		18,198
Interest receivable	18,282		18,925
FDIC indemnification receivable	5,610		4,032
Prepaid assets	5,242		5,229
Other assets	12,517		14,238
Total other assets	$ 169,389		$ 176,432

[1] A bank applying for membership in the Federal Reserve System is required to subscribe to stock in the Federal Reserve Bank (FRB) in a sum equal to six percent of the bank's paid-up capital stock and surplus. One-half of the amount of the bank's subscription shall be paid to the FRB and the remaining half will be subject to call when deemed necessary by the Board of Governors of the Federal Reserve System.

[2] Borrowings from the Federal Home Loan Bank (FHLB) must be supported by capital stock holdings. The minimum activity-based requirement is 4.7% of the outstanding advances. The requirement may be adjusted from time to time by the FHLB within limits established in the FHLB's Capital Plan.