Note 11 - Fair Value Measurements (Details) - Assets and Liabilities Measured on a Non-Recurring Basis (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 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 on a non-recurring basis	4,255				4,255				7,584
Commercial Loans [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets measured 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 on a non-recurring basis	24,974				24,974				29,001
Commercial Mortgage Loans [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets measured on a non-recurring basis	24,974				24,974				29,001
Total losses / (Gains)	515		394		515		459		125		440
Real Estate Construction Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets measured on a non-recurring basis	12,773				12,773
Real Estate Construction Loans [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets measured on a non-recurring basis	12,773				12,773
Residential Mortgage And Equity Lines Member | Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets
Fair Value of Assets measured 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 on a non-recurring basis	12,507				12,507				14,236
Total losses / (Gains)	32		160		32		191		213		605
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member]
Assets
Fair Value of Assets measured on a non-recurring basis		[1]				[1]				[2]
Fair Value, Inputs, Level 1 [Member] | Equity Investments [Member]
Assets
Fair Value of Assets measured on a non-recurring basis									642
Fair Value, Inputs, Level 1 [Member]
Assets
Fair Value of Assets measured on a non-recurring basis									642
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member]
Assets
Fair Value of Assets measured 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 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 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 on a non-recurring basis	4,110	[1]			4,110	[1]			26,498	[2]
Fair Value, Inputs, Level 3 [Member] | Equity Investments [Member]
Assets
Fair Value of Assets measured on a non-recurring basis	5,698				5,698
Fair Value, Inputs, Level 3 [Member]
Assets
Fair Value of Assets measured on a non-recurring basis	64,317				64,317				102,111
Impaired Loans [Member]
Assets
Fair Value of Assets measured 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 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]
Equity Investments [Member]
Assets
Fair Value of Assets measured 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.