Note 12 - Employee Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits								Postretirement benefits
	Three months ended June 30,				Six months ended June 30,				Three months ended June 30,				Six months ended June 30,
	2015		2014		2015		2014		2015		2014		2015		2014
Service cost	$	22	$	16	$	45	$	32	$	4	$	2	$	7	$	5
Interest cost		37		38		73		76		8		9		16		18
Expected return on plan assets		(44)		(43)		(89)		(86)
Amortization of net loss										1				2
Amortization of prior service cost (credit)		1		1		3		3		(2)		(1)		(3)		(2)
Recognition of actuarial loss		8				8
Total pension and postretirement benefit expense	$	24	$	12	$	40	$	25	$	11	$	10	$	22	$	21