Note 5 - Stock-Based Compensation (Detail) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Balance - shares	3,996,630
Balance - weighted-average exercise price (in Dollars per share)	$ 29.45
Balance - weighted-average remaining contractual life	2 years 73 days
Balance - aggregate intrinisc value (in Dollars)	$ 0
Exercisable, March 31, 2013	3,657,290
Exercisable, March 31, 2013 (in Dollars per share)	$ 30.28
Exercisable, March 31, 2013	2 years 73 days
Exercisable, March 31, 2013 (in Dollars)	0
Exercised	0	39,784
Exercised (in Dollars per share)	$ 0
Forfeited	(339,340)
Forfeited (in Dollars per share)	$ 20.45
Balance - shares	3,657,290
Balance - weighted-average exercise price (in Dollars per share)	$ 30.28
Balance - weighted-average remaining contractual life	2 years 73 days
Balance - aggregate intrinisc value (in Dollars)	$ 0