Other Income, Net of Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income, Net of Expenses [Abstract]
Interest income	$ 128	$ 447	$ 392	$ 1,167
Income from life insurance policies	0	0	1,204	0
Gain (loss) on investments	(72)	(86)	(204)	120
License fee income	250	323	616	780
Other	204	26	535	187
Total	$ 510	$ 710	$ 2,543	$ 2,254