Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Income and Expenses [Abstract]
Interest income (expense)	$ 14	$ (9)	$ 138	$ 288
Other nonoperating income	108	69	266	130
Insurance policy (expense) income	(42)	(23)	128	(129)
Other nonoperating expense	(3)	(2)	(6)	(5)
Other income, net	$ 77	$ 35	$ 526	$ 284