Note 11 - Fair Value Measurements (Details) - Financial Asset and Liabilities Measured on a Non-Recurring Basis (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013		Dec. 31, 2012
Impaired loans by type:
Total Losses/(gains)	$ 294		$ 767		$ 3,344		$ 12,666
Commercial Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	13,436				7,584
Commercial Loans [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	13,436				7,584
Commercial Loans [Member]
Impaired loans by type:
Total Losses/(gains)			463		5,731
Commercial Mortgage Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	28,784				29,001
Commercial Mortgage Loans [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	28,784				29,001
Commercial Mortgage Loans [Member]
Impaired loans by type:
Total Losses/(gains)			41		125		440
Construction Residential [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	500				500
Construction Residential [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	500				500
Construction - Other Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	15,376				15,363
Construction - Other Loans [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	15,376				15,363
Construction - Other Loans [Member]
Impaired loans by type:
Total Losses/(gains)							65
Residential Mortgage Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	13,113				14,236
Residential Mortgage Loans [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	13,113				14,236
Residential Mortgage Loans [Member]
Impaired loans by type:
Total Losses/(gains)			189		213		605
Land Loans [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	71,239				66,713
Land Loans [Member] | Impaired Loans [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	71,239				66,713
Land Loans [Member] | Impaired Loans [Member]
Impaired loans by type:
Total Losses/(gains)			741		6,069		1,272
Land Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	30				29
Land Loans [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	30				29
Land Loans [Member]
Impaired loans by type:
Total Losses/(gains)			48				162
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans by type:
Fair Value Measurements		[1]				[2]
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans by type:
Fair Value Measurements	18,261	[1]			13,248	[2]
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	14,337	[1]			26,498	[2]
Other Real Estate Owned [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	32,598	[1]			39,746	[2]
Other Real Estate Owned [Member]
Impaired loans by type:
Total Losses/(gains)	183	[1]	(66)	[1]	(3,134)	[2]	10,904	[2]
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	5,827				8,900
Investments in Venture Capital [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	5,827				8,900
Investments in Venture Capital [Member]
Impaired loans by type:
Total Losses/(gains)	111		92		409		309
Equity Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans by type:
Fair Value Measurements	177				642
Equity Investments [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	177				642
Equity Investments [Member]
Impaired loans by type:
Total Losses/(gains)							181
Fair Value, Inputs, Level 1 [Member]
Impaired loans by type:
Fair Value Measurements	177				642
Fair Value, Inputs, Level 2 [Member]
Impaired loans by type:
Fair Value Measurements	18,261				13,248
Fair Value, Inputs, Level 3 [Member]
Impaired loans by type:
Fair Value Measurements	91,403				102,111
Estimate of Fair Value Measurement [Member]
Impaired loans by type:
Fair Value Measurements	$ 109,841				$ 116,001

[1] Other real estate owned balance of $44.9 million in the condensed consolidated balance sheet is net of estimated disposal costs.

[2] Other real estate owned balance of $53.0 million in the consolidated balance sheet is net of estimated disposal costs.