Note 5 - Stock-Based Compensation (Details) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012
Stock Options [Abstract]
Balance - shares	3,657,290	3,996,630
Balance - weighted-average exercise price (in Dollars per share)	$ 30.28	$ 29.45
Balance - weighted-average remaining contractual life	1 year 328 days	2 years 73 days
Balance - aggregate intrinisc value (in Dollars)	$ 0	$ 0
Exercisable, June 30, 2013	3,654,310
Exercisable, June 30, 2013 (in Dollars per share)	$ 30.28
Exercisable, June 30, 2013	1 year 328 days
Exercisable, June 30, 2013 (in Dollars)	0
Exercised - shares	0	0	39,784
Exercised - weighted average exercise price (in Dollars per share)	$ 0	$ 0
Forfeited - shares	(2,980)	(339,340)
Forfeited - weighted average exercise price (in Dollars per share)	$ 30.79	$ 20.45
Balance - shares	3,654,310	3,657,290
Balance - weighted-average exercise price (in Dollars per share)	$ 30.28	$ 30.28
Balance - weighted-average remaining contractual life	1 year 328 days	2 years 73 days
Balance - aggregate intrinisc value (in Dollars)		$ 0