Note 13 - Stockholders' Equity and Earnings per Share (Detail) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended			24 Months Ended	12 Months Ended
	Dec. 05, 2008	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2004	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2012 Warrant [Member]	Dec. 31, 2011 Warrant [Member]	Dec. 31, 2011 Restricted Stock [Member]	Dec. 31, 2012 Series A Non-Cumulative Preferred Stock [Member]	Dec. 31, 2011 Series A Non-Cumulative Preferred Stock [Member]	Dec. 31, 2010 Series A Non-Cumulative Preferred Stock [Member]	Dec. 31, 2012 First Five Years [Member]	Dec. 31, 2012 After Five Years [Member]
Regulation Restricted On Amount Of Retained Earnings Available For Cash Dividends (in Dollars)		$ 80,800,000								$ 80,800,000
Proceeds from Issuance of Preferred Stock and Preference Stock (in Dollars)	258,000,000												8,600,000
Preferred Stock, Dividend Rate, Percentage													7.00%									5.00%	9.00%
Dividends, Preferred Stock (in Dollars)		$ (4,127,000)	$ (4,123,000)	$ (4,121,000)	$ (4,117,000)	$ (4,114,000)	$ (4,111,000)	$ (4,107,000)	$ (4,105,000)	$ 16,488,000	$ 16,437,000	$ 16,388,000							$ 605,000	$ 605,000	$ 611,000
Sale of Stock, Price Per Share (in Dollars per share)												$ 8.80									$ 200
Common Stock Aggregate Market Price Percentage Of Senior Preferred Stock		15.00%								15.00%
Preferred Stock, Shares Issued		258,000				258,000				258,000	258,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		1,846,374								1,846,374
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)		20.96								20.96
Warrants Aggregate Market Price (in Dollars per share)		$ 38.7								$ 38.7
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount														4,000,000	4,400,000	1,800,000	1,800,000	103,000