Note 6 - Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Service cost	$	-		$	-		$	-		$	-
Interest cost		1,167			1,185			3,502			3,554
Expected return on plan assets		(1,412	)		(1,298	)		(4,236	)		(3,892	)
Loss amortization		121			153			363			458
Net periodic (benefit) cost	$	(124	)	$	40		$	(371	)	$	120