Note 5 - Stock Benefit Plans (Detail) - Stock Options (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Outstanding at December 31, 2011	94
Outstanding at December 31, 2011 (in Dollars per share)	$ 31.89
Outstanding at September 30, 2012	65
Outstanding at September 30, 2012 (in Dollars per share)	$ 30.54
Outstanding at September 30, 2012	7 years 186 days
Options vested and expected to vest at September 30, 2012	65
Options vested and expected to vest at September 30, 2012 (in Dollars per share)	$ 30.54
Options vested and expected to vest at September 30, 2012	7 years 186 days
Options exercisable at September 30, 2012	42
Options exercisable at September 30, 2012 (in Dollars per share)	$ 31.70
Options exercisable at September 30, 2012	6 years 299 days
Granted	3
Expired	(32)
Expired (in Dollars per share)	$ 37.80