Note 5 - Fair Value (Detail) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Fair Value, Measurements, Nonrecurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Jun. 30, 2011 Fair Value, Measurements, Nonrecurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Jun. 30, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Jun. 30, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Jun. 30, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Jun. 30, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Jun. 30, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2012 Fair Value, Measurements, Nonrecurring [Member] Losses for Period [Member]	Jun. 30, 2011 Fair Value, Measurements, Nonrecurring [Member] Losses for Period [Member]
2012
Impaired loans			$37,149	$38,194	0	0	0	0	$37,149	$38,194	$(1,857)	$(3,138)
Other Real Estate Owned (in Dollars)	$ 3,741	$ 5,251	$ 3,741	$ 8,469	$ 0	$ 0	$ 0	$ 0	$ 3,741	$ 8,469	$ (390)	$ (829)