Note 11 - Stock-Based Compensation (Details) - Non-Full Value Awards, all of Which Have Been Granted as Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Non-Full Value Awards, all of Which Have Been Granted as Stock Options [Abstract]
Shares	154,915		306,630
Weighted-Average Exercise Price	$ 15.19		$ 16.02
Weighted-Average Remaining Contractual Term	3 years 73 days
Aggregate Intrinsic Value $(000)	$ 787
Exercisable shares at December 31, 2014	154,915
Exercisable shares at December 31, 2014	$ 15.19
Exercisable shares at December 31, 2014	3 years 73 days
Exercisable shares at December 31, 2014	$ 787	[1]
Exercised	(150,115)
Exercised	$ 16.83
Forfeited	(1,600)
Forfeited	$ 19.37

[1] * The intrinsic value of a stock option is the difference between the market value of the underlying stock and the exercise price of the option.