Pensions (Schedule of Net Periodic Pension Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pensions [Abstract]
Service cost	$ 114	$ 115
Interest cost	179	179
Expected return on plan assets	(312)	(197)
Recognized net actuarial loss	159	171
Net periodic pension cost	$ 140	$ 268