Note 5 - Retirement Plans (Detail) - Components of net periodic benefit cost for our pension plans (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Service cost	$ 1,243	$ 568	$ 3,538	$ 2,701
Interest cost	899	996	2,559	2,502
Expected return on plan assets	(739)	(780)	(2,104)	(2,014)
Loss amortization	624	496	1,775	805
Net periodic benefit cost	$ 2,027	$ 1,280	$ 5,768	$ 3,994