Note 4 - Stock Benefit Plans (Detail) - Stock Options (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Outstanding at December 31, 2011	94
Outstanding at December 31, 2011 (in Dollars per share)	$ 31.89
Expired	(29)
Expired (in Dollars per share)	$ 37.80
Outstanding at June 30, 2012	65
Outstanding at June 30, 2012 (in Dollars per share)	$ 30.54
Outstanding at June 30, 2012	7 years 277 days
Outstanding at June 30, 2012 (in Dollars)	$ 4,712,500
Options vested and expected to vest at June 30, 2012	65
Options vested and expected to vest at June 30, 2012 (in Dollars per share)	$ 30.54
Options vested and expected to vest at June 30, 2012	7 years 277 days
Options vested and expected to vest at June 30, 2012 (in Dollars)	$ 4,712,500
Options exercisable at June 30, 2012	40
Options exercisable at June 30, 2012 (in Dollars per share)	$ 31.84
Options exercisable at June 30, 2012	6 years 354 days