Pension Plan (Details) - Components of the net periodic pension cost (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Components of the net periodic pension cost [Abstract]
Interest cost	$ 140	$ 111	$ 422	$ 371
Expected return on plan assets	(150)	(154)	(449)	(374)
Amortization of net actuarial loss	90	151	268	393
Net periodic pension cost	$ 80	$ 108	$ 241	$ 390