Note 9 - Postretirement Medical Benefits (Tables)

3 Months Ended

Mar. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

Three months ended March 31, (In thousands)	2015		2014
Service cost	$	185	$	121
Interest cost		162		143
Recognized prior service cost		13		52
Recognized net actuarial loss (gain)		10		(17	)
Net periodic benefit cost	$	370	$	299