Note 11 - Fair Value Measurements (Details) - Financial Asset and Liabilities Measured on a Non-Recurring Basis - Prior Year (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013		Dec. 31, 2012
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	$ 78,657				$ 78,657				$ 116,001
Total Losses / (Gains)	548		749		1,158		214		3,344		12,666
Commercial Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	4,255				4,255				7,584
Commercial Loans [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	4,255				4,255				7,584
Total Losses / (Gains)					17		536		5,731
Commercial Mortgage Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	24,974				24,974				29,001
Commercial Mortgage Loans [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	24,974				24,974				29,001
Total Losses / (Gains)	515		394		515		459		125		440
Construction Residential [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									500
Construction Residential [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									500
Construction - Other Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									15,363
Construction - Other Loans [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									15,363
Total Losses / (Gains)											65
Residential Mortgage And Equity Lines Member | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	12,507				12,507				14,236
Residential Mortgage And Equity Lines Member | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	12,507				12,507				14,236
Total Losses / (Gains)	32		160		32		191		213		605
Land Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									29
Land Loans [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									29
Total Losses / (Gains)											162
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis		[1]				[1]				[2]
Fair Value, Inputs, Level 1 [Member] | Equity Investments [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									642
Fair Value, Inputs, Level 1 [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									642
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	14,340	[1]			14,340	[1]			13,248	[2]
Fair Value, Inputs, Level 2 [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	14,340				14,340				13,248
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	54,509				54,509				66,713
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	4,110	[1]			4,110	[1]			26,498	[2]
Fair Value, Inputs, Level 3 [Member] | Investments in Venture Capital [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									8,900
Fair Value, Inputs, Level 3 [Member] | Equity Investments [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	5,698				5,698
Fair Value, Inputs, Level 3 [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	64,317				64,317				102,111
Impaired Loans [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	54,509				54,509				66,713
Total Losses / (Gains)	547		554		564		1,186		6,069		1,272
Other Real Estate Owned [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	18,450	[1]			18,450	[1]			39,746	[2]
Total Losses / (Gains)	(48)	[1]	111	[1]	277	[1]	(1,267)	[1]	(3,134)	[2]	10,904	[2]
Investments in Venture Capital [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis									8,900
Total Losses / (Gains)									409		309
Equity Investments [Member]
Assets
Fair Value of Assets Measured at Fair Value on a Non-Recurring Basis	5,698				5,698				642
Total Losses / (Gains)	$ 49		$ 84		$ 317		$ 295				$ 181

[1] Other real estate owned balance of $29.0 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.