XML 66 R51.htm IDEA: XBRL DOCUMENT v2.4.0.6
Benefit Plans (Details) (Pension Plans, Defined Benefit [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Pension Plans, Defined Benefit [Member]
   
Components of net periodic benefit cost    
Service cost $ 118 $ 106
Interest cost 70 67
Expected return on plan assets (76) (69)
Amortization of prior service cost   1
Amortization of net loss 27 22
Net periodic benefit cost $ 139 $ 127