Note 7 - Other Real Estate Owned (Detail) - Other Real Estate Owned by Portfolio Segment (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Non-covered OREO:
Other Real Estate Owned	$ 21,251	$ 25,073	$ 16,674	$ 14,403
OREO covered by FDIC loss share agreements	7,654	6,646
Commercial Real Estate Owner Occupied [Member]
Non-covered OREO:
Other Real Estate Owned	38	1,077
Commercial Real Estate Investor Income Producing [Member]
Non-covered OREO:
Other Real Estate Owned		1,348
Acquisition, Construction, and Development Portfolio [Member]
Non-covered OREO:
Other Real Estate Owned	11,667	14,527
Residential Mortgage [Member]
Non-covered OREO:
Other Real Estate Owned	1,892	1,062
Residential Construction [Member]
Non-covered OREO:
Other Real Estate Owned		$ 413