Pension - Components of Net Periodic Pension Cost (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Notes to Financial Statements
Interest cost	$ 26	$ 25	$ 77	$ 74
Service cost	5	5	14	14
Expected return on plan assets	(26)	(24)	(79)	(71)
Amortization of prior service costs	3	2	8	7
Amortization of actuarial loss	38	31	113	94
Total net periodic benefit cost	$ 46	$ 39	$ 133	$ 118