Note 22 - Parent Company Only Financial Information (Details) - Condensed Statements of Income for the Holding Company: (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Income Statements, Captions [Line Items]
Interest income									$ 28,310,000	$ 31,306,000	$ 32,121,000
Interest expense	13,058,000	12,866,000	12,999,000	15,940,000	14,498,000	15,610,000	16,097,000	17,070,000	54,863,000	63,275,000	76,723,000
Gain on sale of securities									3,021,000	47,000
Net (loss) gain from fair value adjustments									(2,521,000)	55,000	1,960,000
Other operating expenses									10,634,000	11,450,000	10,485,000
Income tax (expense) benefit	6,458,000	6,024,000	6,155,000	4,319,000	5,782,000	5,988,000	5,519,000	4,558,000	22,956,000	21,847,000	23,469,000
Net income	11,948,000	9,421,000	9,627,000	6,756,000	9,200,000	9,365,000	8,637,000	7,129,000	37,752,000	34,331,000	35,348,000
Holding Company [Member]
Condensed Income Statements, Captions [Line Items]
Dividends from the Bank									20,000,000	20,000,000	20,000,000
Interest income									590,000	694,000	753,000
Interest expense									(1,066,000)	(2,957,000)	(4,325,000)
Gain on sale of securities									17,000
Net (loss) gain from fair value adjustments									(5,475,000)	1,991,000	5,725,000
Other operating expenses									(621,000)	(730,000)	(746,000)
Income before taxes and equity in undistributed earnings of subsidiary									13,445,000	18,998,000	21,407,000
Income tax (expense) benefit									2,857,000	498,000	(585,000)
Income before equity in undistributed earnings of subsidiary									16,302,000	19,496,000	20,822,000
Equity in undistributed earnings of the Bank									21,450,000	14,835,000	14,526,000
Net income									$ 37,752,000	$ 34,331,000	$ 35,348,000