Other (Expense) Income, net (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
Other (Expense) Income, net [Abstract]
Other (expense) income, net	$ (85)	$ 133	$ 375	$ 147
Interest Income [Member]
Other (Expense) Income, net [Abstract]
Other (expense) income, net	18	88	650	254
Other Nonoperating Income [Member]
Other (Expense) Income, net [Abstract]
Other (expense) income, net	18	45	57	56
Insurance Policy (Expense) Income [Member]
Other (Expense) Income, net [Abstract]
Other (expense) income, net	(121)	3	(332)	(155)
Other Nonoperating Expense [Member]
Other (Expense) Income, net [Abstract]
Other (expense) income, net	$ 0	$ (3)	$ 0	$ (8)