Note 5 - Allowance for Loan Losses (Details) - Allowance for Loan Losses by Class and Impairment Methodology (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Allowance for loan losses:
Allowance for loan losses	$ 34,852,000	$ 35,907,000
Allowance for loan losses, ending balance: individually evaluated for impairment	990,000		1,043,000
Allowance for loan losses, ending balance: collectively evaluated for impairment	34,268,000		33,809,000
Loans, ending balance: purchase credit impaired			32,520,000
Loans	826,428,000		820,384,000
Loans, ending balance: individually evaluated for impairment	5,671,000		6,262,000
Loans, ending balance: collectively evaluated for impairment	793,301,000		781,602,000
Allowance for loan losses, ending balance: purchase credit impaired	27,456,000
Loans charged off	(8,545,000)	(9,371,000)
Recoveries of loans previously charged off	2,176,000	1,933,000
Provision charged to operations	6,775,000	6,300,000
Allowance for loan losses	35,258,000	34,769,000
Real Estate - Residential Mortgage [Member]
Allowance for loan losses:
Allowance for loan losses	2,355,000	2,358,000
Allowance for loan losses, ending balance: individually evaluated for impairment	430,000		390,000
Allowance for loan losses, ending balance: collectively evaluated for impairment	1,900,000		1,965,000
Loans, ending balance: purchase credit impaired			2,694,000
Loans	180,514,000		188,455,000
Loans, ending balance: individually evaluated for impairment	2,348,000		2,601,000
Loans, ending balance: collectively evaluated for impairment	176,088,000		183,160,000
Allowance for loan losses, ending balance: purchase credit impaired	2,078,000
Loans charged off	(79,000)	(475,000)
Recoveries of loans previously charged off	24,000	86,000
Provision charged to operations	30,000	522,000
Allowance for loan losses	2,330,000	2,491,000
Real Estate Construction [Member]
Allowance for loan losses:
Allowance for loan losses		424,000	434,000
Allowance for loan losses, ending balance: individually evaluated for impairment			0
Allowance for loan losses, ending balance: collectively evaluated for impairment	434,000		434,000
Loans, ending balance: purchase credit impaired			771,000
Loans	7,580,000		5,810,000
Loans, ending balance: collectively evaluated for impairment	7,179,000		5,039,000
Allowance for loan losses, ending balance: purchase credit impaired	401,000
Provision charged to operations		50,000
Allowance for loan losses	434,000	474,000	434,000
Commercial, Financial And Agricultural [Member]
Allowance for loan losses:
Allowance for loan losses	7,805,000	9,824,000
Allowance for loan losses, ending balance: individually evaluated for impairment	545,000		639,000
Allowance for loan losses, ending balance: collectively evaluated for impairment	7,133,000		7,166,000
Loans, ending balance: purchase credit impaired			28,602,000
Loans	295,545,000		288,593,000
Loans, ending balance: individually evaluated for impairment	3,200,000		3,437,000
Loans, ending balance: collectively evaluated for impairment	267,726,000		256,554,000
Allowance for loan losses, ending balance: purchase credit impaired	24,619,000
Loans charged off	(174,000)	(2,270,000)
Recoveries of loans previously charged off	47,000	60,000
Provision charged to operations		328,000
Allowance for loan losses	7,678,000	7,942,000
Equity Lines [Member]
Allowance for loan losses:
Allowance for loan losses	892,000	885,000
Allowance for loan losses, ending balance: individually evaluated for impairment	1,000		0
Allowance for loan losses, ending balance: collectively evaluated for impairment	844,000		892,000
Loans, ending balance: purchase credit impaired			332,000
Loans	50,577,000		50,795,000
Loans, ending balance: individually evaluated for impairment	30,000		131,000
Loans, ending balance: collectively evaluated for impairment	50,213,000		50,332,000
Allowance for loan losses, ending balance: purchase credit impaired	334,000
Loans charged off	(47,000)	(37,000)
Recoveries of loans previously charged off		27,000
Provision charged to operations		11,000
Allowance for loan losses	845,000	886,000
Consumer [Member]
Allowance for loan losses:
Allowance for loan losses	273,000	283,000
Allowance for loan losses, ending balance: individually evaluated for impairment	14,000		14,000
Allowance for loan losses, ending balance: collectively evaluated for impairment	282,000		259,000
Loans, ending balance: purchase credit impaired			121,000
Loans	8,239,000		9,007,000
Loans, ending balance: individually evaluated for impairment	93,000		93,000
Loans, ending balance: collectively evaluated for impairment	8,122,000		8,793,000
Allowance for loan losses, ending balance: purchase credit impaired	24,000
Loans charged off	(147,000)	(228,000)
Recoveries of loans previously charged off	170,000	79,000
Provision charged to operations		149,000
Allowance for loan losses	296,000	283,000
Consumer Finance [Member]
Allowance for loan losses:
Allowance for loan losses	23,093,000	22,133,000
Allowance for loan losses, ending balance: individually evaluated for impairment			0
Allowance for loan losses, ending balance: collectively evaluated for impairment	23,675,000		23,093,000
Loans	283,973,000		277,724,000
Loans, ending balance: collectively evaluated for impairment	283,973,000		277,724,000
Loans charged off	(8,098,000)	(6,361,000)
Recoveries of loans previously charged off	1,935,000	1,681,000
Provision charged to operations	6,745,000	5,240,000
Allowance for loan losses	$ 23,675,000	$ 22,693,000