Defined Pension Plans (Details 1) (Pension Plans, Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Scenario, Forecast [Member]
Service cost - benefits earned during the year	$ 134
Interest cost on projected benefit obligation	329
Net amortization	422
Net periodic pension cost	885
Scenario, Actual [Member]
Service cost - benefits earned during the year	89
Interest cost on projected benefit obligation	295
Net amortization	250
Net periodic pension cost	$ 634