Note 12 - Derivative Financial Instruments and Hedging Activities (Detail) - Individual Loan Swap Information (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Original Amount [Member] | 5.85% Due 4/10/13 [Member]
Notional Amount	2,670
Original Amount [Member] | 5.8% Due 4/9/13 [Member]
Notional Amount	1,800
Original Amount [Member] | 5.5% Due 10/15/15 [Member]
Notional Amount	2,555
Original Amount [Member] | 5.25% Due 4/27/17 [Member]
Notional Amount	3,595
Original Amount [Member]
Notional Amount	10,620
Current Amount [Member] | 5.85% Due 4/10/13 [Member]
Notional Amount	2,272
Current Amount [Member] | 5.8% Due 4/9/13 [Member]
Notional Amount	405
Current Amount [Member] | 5.5% Due 10/15/15 [Member]
Notional Amount	2,460
Current Amount [Member] | 5.25% Due 4/27/17 [Member]
Notional Amount	3,333
Current Amount [Member]
Notional Amount	8,470
5.85% Due 4/10/13 [Member]
Termination Date	Dec. 31, 2008
Fixed Rate	5.85%
Floating Rate Payer Spread	2.38%
5.8% Due 4/9/13 [Member]
Termination Date	Dec. 31, 2008
Fixed Rate	5.80%
Floating Rate Payer Spread	2.33%
5.5% Due 10/15/15 [Member]
Termination Date	Dec. 31, 2008
Fixed Rate	5.50%
Floating Rate Payer Spread	2.88%
5.25% Due 4/27/17 [Member]
Termination Date	Dec. 31, 2008
Fixed Rate	5.25%
Floating Rate Payer Spread	2.73%