Note 8 - Employee Benefit Plans (Detail) - Net Periodic Benefit Cost (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Post Retirement Health Care and Life Benefits [Member]
Service cost	$ 56	$ 56	$ 112	$ 112
Interest cost	59	102	118	204
Prior service cost	(4)	(4)	(8)	(8)
Recognition of net loss		22		44
Total benefit cost	111	176	222	352
Pension Plans, Defined Benefit [Member]
Service cost	0	0	0	0
Interest cost	51	59	102	118
Expected return on plan assets	(57)	(49)	(114)	(98)
Prior service cost	0	0	0	0
Recognition of net loss	28	34	56	68
Total benefit cost	$ 22	$ 44	$ 44	$ 88