Other Income (Expense), 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 (expense) income, net	$ (40)	$ (60)	$ 460	$ 14
Interest (Expense) Income [Member]
Other Income (Expense), Net [Abstract]
Other (expense) income, net	(25)	(5)	632	166
Other Nonoperating Income [Member]
Other Income (Expense), Net [Abstract]
Other (expense) income, net	46	27	39	6
Insurance Policy Expense [Member]
Other Income (Expense), Net [Abstract]
Other (expense) income, net	$ (61)	$ (82)	$ (211)	$ (158)