Note 11 - Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three months ended						Nine months ended
	September 30,						September 30,
	2016			2015			2016			2015
Components of net periodic benefit cost
Interest cost	$	597		$	608		$	1,792		$	1,823
Expected return on plan assets		(662	)		(718	)		(1,986	)		(2,153	)
Recognized actuarial loss		194			202			582			608
Net periodic benefit cost	$	129		$	92		$	388		$	278

	Three months ended						Nine months ended
	September 30,						September 30,
	2016			2015			2016			2015
Components of net periodic benefit cost
Service cost	$	186		$	193		$	561		$	585
Interest cost		186			146			560			442
Recognized actuarial loss		49			83			147			249
Amortization of prior service benefit		(1	)		(2	)		(3	)		(5	)
Net periodic benefit cost	$	420		$	420		$	1,265		$	1,271