Pension Plan (Details) - Components of net periodic pension cost: (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Components of net periodic pension cost: [Abstract]
Interest cost	$ 111	$ 130	$ 371	$ 390
Expected return on plan assets	(154)	(109)	(374)	(329)
Amortization of net actuarial loss	151	121	393	363
Net periodic pension cost	$ 108	$ 142	$ 390	$ 424