Note 5 - Stock-Based Compensation (Details) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2014
Stock Options [Abstract]
Balance - shares	2,364,874	2,812,874	2,374,874
Balance - weighted-average exercise price	$ 32.38	$ 31.81	$ 32.38
Balance - weighted-average remaining contractual life	1 year 6 months	1 year 328 days	1 year 255 days	2 years
Balance - aggregate intrinisc value	$ 3,487	$ 2,119	$ 1,148
Exercisable, September 30, 2014					2,364,874
Exercisable, September 30, 2014	$ 32.38
Exercisable, September 30, 2014	1 year 6 months
Exercisable, September 30, 2014					3,487
Forfeited - shares			(10,000)	(438,000)
Forfeited - weighted average exercise price			$ 32.26	$ 28.70
Balance - shares			2,364,874	2,374,874
Balance - weighted-average exercise price			$ 32.38	$ 32.38
Balance - aggregate intrinisc value			$ 4,083	$ 1,148