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	$ 94	$ 13	$ 179	$ 45
Other nonoperating income	298	65	247	110
Insurance policy income (expense)	0	78	0	(55)
Other income, net	$ 392	$ 156	$ 426	$ 100