Note 8 - Deposits (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block [Abstract]

Summary of Deposits and Percentage Change in Deposits [Table Text Block]

											Percent
	December 31, 2014					December 31, 2013					Increase
	Balance		%			Balance		%			(Decrease)
Noninterest-bearing demand	$	558,738,000		24.5	%	$	224,580,000		20.1	%		148.8	%
Interest-bearing checking		413,382,000		18.2			197,388,000		17.6			109.4
Money market		235,587,000		10.3			133,369,000		11.9			76.6
Savings		330,459,000		14.5			52,606,000		4.7			528.2
Time, under $100,000		181,026,000		8.0			43,251,000		3.9			318.5
Time, $100,000 and over		382,120,000		16.8			254,600,000		22.8			50.1
		2,101,312,000		92.3			905,794,000		81.0			132.0
Out-of-area time, under $100,000		2,422,000		0.1			4,078,000		0.4			(40.6	)
Out-of-area time, $100,000 and over		173,181,000		7.6			209,039,000		18.6			(17.2	)
		175,603,000		7.7			213,117,000		19.0			(17.6	)
Total deposits	$	2,276,915,000		100.0	%	$	1,118,911,000		100.0	%		103.5

ContractualMaturities of Certificates of Deposits [Table Text Block]

	2014		2013
In one year or less	$	368,163,000	$	213,454,000
In one to two years		153,346,000		80,138,000
In two to three years		118,919,000		73,271,000
In three to four years		60,953,000		95,979,000
In four to five years		37,368,000		48,126,000
Total certificates of deposit	$	738,749,000	$	510,968,000

Contractual Maturities of Certificates of Deposits of More Than Specified Amount [Table Text Block]

	2014		2013
Up to three months	$	75,356,000	$	57,469,000
Three months to six months		65,838,000		41,237,000
Six months to twelve months		125,492,000		93,920,000
Over twelve months		288,615,000		271,013,000
Total certificates of deposit	$	555,301,000	$	463,639,000