Benefit Plans (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Components of Net Periodic Benefit Cost
Service cost	$ 293	$ 307	$ 860	$ 613	$ 821
Interest cost	271	351	812	701	$ 935
Net loss	107	31	320	95
Net periodic pension cost	$ 671	$ 689	$ 1,992	$ 1,409