Note 11 - Stock-Based Compensation (Detail) - 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, 2012
Shares	975,640
Weighted-Average Exercise Price (in Dollars per share)	$ 15.16
Weighted-Average Remaining Contractual Term	2 years 328 days
Aggregate Intrinsic Value $(000) (in Dollars)	$ 812
Exercisable shares at December 31, 2012	708,395
Exercisable shares at December 31, 2012 (in Dollars per share)	$ 16.32
Exercisable shares at December 31, 2012	2 years 255 days
Exercisable shares at December 31, 2012 (in Dollars)	502	[1]
Vested but unexercisable shares at
December 31, 2012	22,660
December 31, 2012 (in Dollars per share)	$ 11.56
December 31, 2012	5 years 328 days
December 31, 2012 (in Dollars)	$ 112	[1]
Exercised	(150,225)
Exercised (in Dollars per share)	$ 11.92
Forfeited	(55,060)
Forfeited (in Dollars per share)	$ 13.38
Shares	770,355
Weighted-Average Exercise Price (in Dollars per share)	$ 15.92

[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.