Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income and Expenses [Abstract]
Interest income	$ 11	$ 21	$ 299	$ 237
Other nonoperating income	72	29	202	108
Insurance policy income (expense)	20	(56)	(109)	(292)
Other nonoperating expense	(3)	(3)	(8)	(8)
Other income (expense), net	$ 100	$ (9)	$ 384	$ 45