Pensions (Schedule of Net Periodic Pension Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Pensions [Abstract]
Service cost	$ 115	$ 87	$ 345	$ 274
Interest cost	179	183	537	545
Expected return on plan assets	(197)	(189)	(591)	(565)
Recognized net actuarial loss	171	95	514	275
Net periodic cost	$ 268	$ 176	$ 805	$ 529