Pension Plans (Details 3) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Components of net periodic pension cost
Interest cost	$ 113,000	$ 113,000	$ 226,000	$ 227,000
Expected return on plan assets	(137,000)	(127,000)	(275,000)	(254,000)
Recognized net actuarial loss	23,000	20,000	47,000	40,000
Net periodic pension cost	(1,000)	6,000	(2,000)	13,000
Contributions to pension plans		$ 45,000		$ 101,000