Note 11 - Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three months ended						Six months ended
	June 30,						June 30,
	2016			2015			2016			2015
Components of net periodic benefit cost
Interest cost	$	598		$	607		$	1,195		$	1,215
Expected return on plan assets		(662	)		(717	)		(1,324	)		(1,435	)
Recognized actuarial loss		194			203			388			406
Net periodic benefit cost	$	130		$	93		$	259		$	186

	Three months ended						Six months ended
	June 30,						June 30,
	2016			2015			2016			2015
Components of net periodic benefit cost
Service cost	$	187		$	195		$	375		$	392
Interest cost		187			147			374			296
Recognized actuarial loss		49			83			98			166
Amortization of prior service benefit		(1	)		(2	)		(2	)		(3	)
Net periodic benefit cost	$	422		$	423		$	845		$	851