Pension Plan (Details) - Components of the net periodic pension cost - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Components of the net periodic pension cost [Abstract]
Interest cost	$ 120	$ 144
Expected return on plan assets	(168)	(169)
Amortization of net actuarial loss	$ 48	140
Net periodic pension cost		$ 115