Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	$ 24,133	$ 26,428
Total Losses	(3,565)	(4,972)
Non-Covered Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	4,909	6,618
Non-Covered Other Real Estate Owned [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	4,909	6,618
Total Losses	(822)	(1,360)
Covered Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	6,035	7,929
Covered Other Real Estate Owned [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	6,035	7,929
Total Losses	(133)	(371)
Originated Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	2,537	3,097
Originated Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	1,741	2,100
Originated Impaired Loans [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	4,278	5,197
Total Losses	(2,093)	(3,158)
Purchased Covered Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	3,421	2,224
Purchased Covered Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	5,490	4,460
Purchased Covered Impaired Loans [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	8,911	6,684
Total Losses	(517)	(83)
Fair Value, Inputs, Level 2 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	16,902	19,868
Fair Value, Inputs, Level 3 [Member]
Note 9 - Fair Value Measurements (Details) - Assets measured at fair value on a nonrecurring basis [Line Items]
Fair Value	$ 7,231	$ 6,560