Note 7 - Retirement and Postretirement Plans (Details) - Components of Net Periodic Benefit Cost (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plan [Member]
Note 7 - Retirement and Postretirement Plans (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	$ 43	$ 43	$ 128	$ 128
Interest cost	5,530	143	16,590	429
Expected return on plan assets	(6,717)	(156)	(20,150)	(468)
Amortization of net loss		9		27
Net periodic benefit cost (income)	(1,144)	39	(3,432)	116
Other Postretirement Benefit Plan [Member]
Note 7 - Retirement and Postretirement Plans (Details) - Components of Net Periodic Benefit Cost [Line Items]
Service cost	20		60
Interest cost	269		807
Net periodic benefit cost (income)	$ 289		$ 867