Other (Expense) Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Income and Expenses [Abstract]
Interest income	$ 23	$ 18	$ 419	$ 650
Other nonoperating income	38	18	108	57
Insurance policy expense	(119)	(121)	(310)	(332)
Other nonoperating expense	(3)	0	(8)	0
Other (expense) income, net	$ (61)	$ (85)	$ 209	$ 375