Note 18 - Disclosures Regarding Fair Value (Details) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Total assets measured at fair value on a nonrecurring basis	$ 246,885	$ 264,872
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Mortgage loans held for sale	0	0
Other loans held for sale		800
Impaired loans in gross loans	0	0
Foreclosed real estate and repossessed personal property	479	0
Long-lived assets held for sale	0	0
Total assets measured at fair value on a nonrecurring basis	479	800
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets
Mortgage loans held for sale	2,934	6,114
Other loans held for sale		0
Impaired loans in gross loans	5,296	6,285
Foreclosed real estate and repossessed personal property	545	817
Long-lived assets held for sale	0	0
Total assets measured at fair value on a nonrecurring basis	8,775	13,216
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets
Mortgage loans held for sale	0	0
Other loans held for sale		0
Impaired loans in gross loans	2,885	189
Foreclosed real estate and repossessed personal property	6,155	9,163
Long-lived assets held for sale	685	685
Total assets measured at fair value on a nonrecurring basis	9,725	10,037
Fair Value, Measurements, Nonrecurring [Member]
Assets
Mortgage loans held for sale	2,934	6,114
Other loans held for sale		800
Impaired loans in gross loans	8,181	6,474
Foreclosed real estate and repossessed personal property	7,179	9,980
Long-lived assets held for sale	685	685
Total assets measured at fair value on a nonrecurring basis	18,979	24,053
Fair Value, Inputs, Level 1 [Member]
Assets
Total assets measured at fair value on a nonrecurring basis	24,908	58,740
Fair Value, Inputs, Level 2 [Member]
Assets
Total assets measured at fair value on a nonrecurring basis	221,977	206,132
Fair Value, Inputs, Level 3 [Member]
Assets
Total assets measured at fair value on a nonrecurring basis	$ 0	$ 0