Note 11 - Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three months ended
	March 31,
	2016			2015
Components of net periodic benefit cost
Interest cost	$	597		$	608
Expected return on plan assets		(662	)		(718	)
Recognized actuarial loss		194			203
Net periodic cost	$	129		$	93

	Three months ended
	March 31,
	2016			2015
Components of net periodic benefit cost
Service cost	$	188		$	197
Interest cost		187			149
Recognized actuarial loss		49			83
Amortization of prior service benefit		(1	)		(1	)
Net periodic benefit cost	$	423		$	428