Note 10 - Postretirement Medical Benefits (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,
(In thousands)	201 7		201 6		2017			2016
Service cost	$	137	$	159	$	420		$	478
Interest cost		164		171		496			512
Curtailment gain recognized		-		-		(351	)		-
Recognized prior service cost		-		12		8			37
Net periodic benefit cost	$	301	$	342	$	573		$	1,027