Note 13 - Fair Value Measurements (Detail) - Valuation Methodology and Unobservable Inputs for Level 3 Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Fair Value (in Dollars)	8,527
Appraisals [Member] | Minimum [Member] | Real Estate [Member]
Range of Inputs	0.00%
Appraisals [Member] | Maximum [Member] | Real Estate [Member]
Range of Inputs	55.00%
Appraisals [Member] | Real Estate [Member]
Fair Value (in Dollars)	3,880
Discounted Cash Flows [Member] | Minimum [Member] | Impaired Loans [Member]
Range of Inputs	0.00%
Discounted Cash Flows [Member] | Maximum [Member] | Impaired Loans [Member]
Range of Inputs	50.00%
Discounted Cash Flows [Member] | Impaired Loans [Member]
Fair Value (in Dollars)	4,534
Collateral Based Measurements [Member] | Minimum [Member] | Impaired Loans [Member]
Range of Inputs	0.00%
Collateral Based Measurements [Member] | Maximum [Member] | Impaired Loans [Member]
Range of Inputs	60.00%
Collateral Based Measurements [Member] | Impaired Loans [Member]
Fair Value (in Dollars)	113
Minimum [Member]
Range of Inputs	0.00%
Maximum [Member]
Range of Inputs	60.00%
Real Estate [Member]
Range of Inputs	8.00%