Pensions (Schedule of Net Periodic Pension Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pensions [Abstract]
Service cost	$ 115	$ 84	$ 230	$ 187
Interest cost	179	180	358	362
Expected return on plan assets	(197)	(188)	(394)	(376)
Recognized net actuarial loss	171	91	342	180
Net periodic cost	$ 268	$ 167	$ 536	$ 353