Note 3 - Earnings Per Share (Details) - Earnings Per Common Share: (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Common Share: [Abstract]
Net income, as reported (in Dollars)	$ 10,296		$ 6,756
Divided by:
Weighted average common shares outstanding	29,984		30,449
Weighted average common stock equivalents	38		32
Total weighted average common shares outstanding and common stock equivalents	30,022		30,481
Basic earnings per common share (in Dollars per share)	$ 0.34		$ 0.22
Diluted earnings per common share (1) (in Dollars per share)	$ 0.34	[1]	$ 0.22	[1]
Dividend payout ratio	43.70%		59.10%

[1] For the three months ended March 31, 2014, there were no options that were anti-dilutive. For the three months ended March 31, 2013, options topurchase 542,400 shares at an average exercise price of $17.66 were not included in the computation of diluted earnings per common share as theywere anti-dilutive.