Other Income, Net (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
Other Income (Expense), Net [Abstract]
Other income, net	$ 142	$ 84	$ 20	$ 146
Interest Income [Member]
Other Income (Expense), Net [Abstract]
Other income, net	139	90	182	234
Other Nonoperating Income [Member]
Other Income (Expense), Net [Abstract]
Other income, net	3	1	31	3
Insurance Policy Expense [Member]
Other Income (Expense), Net [Abstract]
Other income, net	$ 0	$ (7)	$ (193)	$ (91)