Note 5 - Stock-Based Compensation (Details) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Stock Options [Abstract]
Balance - shares	2,374,874			2,812,874
Balance - weighted-average exercise price	$ 32.38			$ 31.81
Balance - weighted-average remaining contractual life	1 year 255 days	2 years		1 year 328 days
Balance - aggregate intrinisc value	$ 1,148			$ 2,119
Exercisable, June 30, 2014	2,364,874		2,364,874
Exercisable, June 30, 2014			$ 32.38
Exercisable, June 30, 2014			1 year 255 days
Exercisable, June 30, 2014	4,083		4,083
Forfeited - shares	(10,000)	(438,000)
Forfeited - weighted average exercise price	$ 32.26	$ 28.70
Balance - shares	2,364,874	2,374,874	2,364,874
Balance - weighted-average exercise price	$ 32.38	$ 32.38	$ 32.38
Balance - weighted-average remaining contractual life	1 year 255 days	2 years		1 year 328 days
Balance - aggregate intrinisc value	$ 4,083	$ 1,148	$ 4,083