Note 5 - Stock-Based Compensation (Details) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Stock Options [Abstract]
Balance - shares		2,812,874
Balance - weighted-average exercise price		$ 31.81
Balance - weighted-average remaining contractual life	2 years	1 year 328 days
Balance - aggregate intrinisc value		$ 2,119
Exercisable, March 31, 2014	2,374,874
Exercisable, March 31, 2014	$ 32.38
Exercisable, March 31, 2014	2 years
Exercisable, March 31, 2014	1,148
Forfeited	(438,000)
Forfeited	$ 28.70
Balance - shares	2,374,874
Balance - weighted-average exercise price	$ 32.38
Balance - weighted-average remaining contractual life	2 years	1 year 328 days
Balance - aggregate intrinisc value	$ 1,148