Note 6 - Deposits (Details) - Summary of Deposits (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Summary of Deposits [Abstract]
Noninterest-bearing checking (in Dollars)	$ 515,646,000	$ 224,580,000
Noninterest-bearing checking	22.40%	20.10%
Noninterest-bearing checking	129.60%
Interest-bearing checking (in Dollars)	424,362,000	197,388,000
Interest-bearing checking	18.40%	17.60%
Interest-bearing checking	115.00%
Money market (in Dollars)	237,798,000	133,369,000
Money market	10.30%	11.90%
Money market	78.30%
Savings (in Dollars)	341,924,000	52,606,000
Savings	14.80%	4.70%
Savings	550.00%
Time, under $100,000 (in Dollars)	208,417,000	43,251,000
Time, under $100,000	9.10%	3.90%
Time, under $100,000	381.90%
Time, $100,000 and over (in Dollars)	387,305,000	254,600,000
Time, $100,000 and over	16.80%	22.80%
Time, $100,000 and over	52.10%
(in Dollars)	2,115,452,000	905,794,000
	91.80%	81.00%
	133.50%
Out-of-area time, under $100,000 (in Dollars)	3,150,000	4,078,000
Out-of-area time, under $100,000	0.20%	0.40%
Out-of-area time, under $100,000	(22.80%)
Out-of-area time, $100,000 and over (in Dollars)	184,659,000	209,039,000
Out-of-area time, $100,000 and over	8.00%	18.60%
Out-of-area time, $100,000 and over	(11.70%)
(in Dollars)	187,809,000	213,117,000
	8.20%	19.00%
	(11.90%)
Total deposits (in Dollars)	$ 2,303,261,000	$ 1,118,911,000
Total deposits	100.00%	100.00%
Total deposits	105.80%