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	$ (73)	$ 286	$ (53)	$ 432
Interest Income [Member]
Other (Expense) Income, net [Abstract]
Other (expense) income, net	51	140	233	374
Other Nonoperating Income [Member]
Other (Expense) Income, net [Abstract]
Other (expense) income, net	3	4	34	7
Insurance Policy (Expense) Income [Member]
Other (Expense) Income, net [Abstract]
Other (expense) income, net	$ (127)	$ 142	$ (320)	$ 51