Note 11 - Employee Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits								Postretirement benefits
	Three months ended September 30,				Nine months ended September 30,				Three months ended September 30,				Nine months ended September 30,
	2016		2015		2016		2015		2016		2015		2016		2015
Service cost	$	22	$	22	$	65	$	67	$	3	$	3	$	7	$	10
Interest cost		31		36		93		109		6		8		19		24
Expected return on plan assets		(41)		(44)		(124)		(133)
Amortization of net loss												1		(1)		3
Amortization of prior service cost (credit)		1		2		4		5		(1)		(2)		(3)		(5)
Recognition of actuarial loss		26				60		8
Total pension and postretirement benefit expense	$	39	$	16	$	98	$	56	$	8	$	10	$	22	$	32