Note 4 - Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31,
	2013			2012
Service cost	$	1,325		$	1,147
Interest cost		917			830
Expected return on plan assets		(830	)		(682	)
Loss amortization		742			576
Net periodic benefit cost	$	2,154		$	1,871