Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Income and Expenses [Abstract]
Interest (expense) income	$ (73)	$ 11	$ 65	$ 299
Other nonoperating income	33	72	299	202
Insurance policy (expense) income	(58)	20	70	(109)
Other nonoperating expense	(4)	(3)	(10)	(8)
Other (expense) income, net	$ (102)	$ 100	$ 424	$ 384