Note 4 - Periodic Pension Expense (Details) - Net Periodic Pension Expense (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Periodic Pension Expense [Abstract]
Service cost - benefits earned during the period	$ 32,000	$ 149,000	$ 331,000	$ 447,000
Interest cost on projected benefit obligation	252,000	256,000	773,000	767,000
Expected return on plan assets	(332,000)	(318,000)	(998,000)	(953,000)
Amortization of prior service cost	3,000	5,000	9,000	13,000
Recognized actuarial loss	185,000	239,000	758,000	718,000
Settlement loss	208,000		457,000
Net periodic pension cost	$ 348,000	$ 331,000	$ 1,330,000	$ 992,000