Note 4 - Loans and Allowance for Loan Losses (Details) - Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year: - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period				$ 29,028,000
Provision for loan losses	$ 3,006,000		$ 1,602,000	4,177,000		$ 2,510,000
Balance	30,567,000			30,567,000
Loans, Excluding Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	29,183,000	[1]	26,983,000	29,028,000	[1],[2]	27,442,000
Provision for loan losses	2,402,000	[3]	1,602,000	3,573,000	[3]	2,510,000
Charge-offs	(1,501,000)		(2,481,000)	(3,044,000)		(4,562,000)
Recoveries	483,000		1,426,000	1,010,000		2,140,000
Net charge-offs	(1,018,000)		(1,055,000)	(2,034,000)		(2,422,000)
Balance	30,567,000	[1]	27,530,000	30,567,000	[1]	27,530,000
Period-end amount allocated to:
Loans individually evaluated for impairment	2,012,000		2,012,000	2,012,000		2,012,000	$ 2,065,000
Loans collectively evaluated for impairment	28,555,000		25,518,000	28,555,000		25,518,000	26,963,000
Loans, Excluding Acquired Loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	6,870,000	[1]	3,508,000	6,962,000	[1],[2]	3,205,000
Provision for loan losses	(1,569,000)	[3]	613,000	(1,585,000)	[3]	984,000
Charge-offs			(186,000)	(245,000)		(268,000)
Recoveries	9,000		16,000	178,000		30,000
Net charge-offs	9,000		(170,000)	(67,000)		(238,000)
Balance	5,310,000	[1]	3,951,000	5,310,000	[1]	3,951,000
Period-end amount allocated to:
Loans individually evaluated for impairment	396,000		136,000	396,000		136,000	185,000
Loans collectively evaluated for impairment	4,914,000		3,815,000	4,914,000		3,815,000	6,777,000
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	15,553,000	[1]	16,393,000	15,161,000	[1],[2]	16,885,000
Provision for loan losses	3,311,000	[3]	(142,000)	3,984,000	[3]	93,000
Charge-offs	(333,000)		(1,144,000)	(626,000)		(2,179,000)
Recoveries	46,000		1,062,000	58,000		1,370,000
Net charge-offs	(287,000)		(82,000)	(568,000)		(809,000)
Balance	18,577,000	[1]	16,169,000	18,577,000	[1]	16,169,000
Period-end amount allocated to:
Loans individually evaluated for impairment	1,513,000		1,697,000	1,513,000		1,697,000	1,756,000
Loans collectively evaluated for impairment	17,064,000		14,472,000	17,064,000		14,472,000	13,405,000
Loans, Excluding Acquired Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	5,527,000	[1]	5,444,000	5,445,000	[1],[2]	5,430,000
Provision for loan losses	352,000	[3]	576,000	1,006,000	[3]	1,135,000
Charge-offs	(802,000)		(725,000)	(1,587,000)		(1,541,000)
Recoveries	241,000		215,000	454,000		486,000
Net charge-offs	(561,000)		(510,000)	(1,133,000)		(1,055,000)
Balance	5,318,000	[1]	5,510,000	5,318,000	[1]	5,510,000
Period-end amount allocated to:
Loans individually evaluated for impairment	14,000		13,000	14,000		13,000	6,000
Loans collectively evaluated for impairment	5,304,000		5,497,000	5,304,000		5,497,000	5,439,000
Loans, Excluding Acquired Loans [Member] | Unallocated Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,233,000	[1]	1,638,000	1,460,000	[1],[2]	1,922,000
Provision for loan losses	308,000	[3]	555,000	168,000	[3]	298,000
Charge-offs	(366,000)		(426,000)	(586,000)		(574,000)
Recoveries	187,000		133,000	320,000		254,000
Net charge-offs	(179,000)		(293,000)	(266,000)		(320,000)
Balance	1,362,000	[1]	1,900,000	1,362,000	[1]	1,900,000
Period-end amount allocated to:
Loans individually evaluated for impairment	89,000		166,000	89,000		166,000	118,000
Loans collectively evaluated for impairment	$ 1,273,000		$ 1,734,000	$ 1,273,000		$ 1,734,000	$ 1,342,000

[1] Allowance for loan losses at March 31, 2015, June 30, 2015 and December 31, 2014 includes $954,000 allowance for loans acquired, covered by loss share. The total allowance for loan losses at March 31, 2015, June 30, 2015 and December 31, 2014 was $30,137,000, $31,521,000 and $29,982,000, respectively.

[2] Allowance for loan losses at December 31, 2014 includes $954,000 allowance for loans acquired, covered by loss share. The total allowance for loan losses at December 31, 2014 was $29,982,000.

[3] Provision for loan losses of $604,000 attributable to loans acquired, not covered by loss share, was excluded from this table for the three and six months ended June 30, 2015 (total provision for loan losses for the three and six months ended June 30, 2015 was $3,006,000 and $4,177,000). The $604,000 was subsequently charged-off, resulting in no ending balance in the allowance related to loans acquired, not covered by loss share.