Pension - Components of Net Periodic Pension Cost (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Notes to Financial Statements
Interest cost	$ 17	$ 26	$ 43	$ 52
Service cost	12	5	17	10
Expected return on plan assets	(28)	(26)	(54)	(53)
Amortization of prior service costs	2	3	5	5
Amortization of actuarial loss	39	38	77	76
Total net periodic benefit cost	$ 43	$ 45	$ 87	$ 90