Pension Plan (Details) - Components of the net periodic pension cost (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Components of the net periodic pension cost [Abstract]
Interest cost	$ 158	$ 130	$ 282	$ 260
Expected return on plan assets	(174)	(110)	(299)	(220)
Amortization of net actuarial loss	47	121	178	242
Net periodic pension cost	$ 31	$ 141	$ 161	$ 282