XML 90 R41.htm IDEA: XBRL DOCUMENT v2.4.0.6
Pension Plans (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Components of net periodic pension cost      
Service cost $ 1,300 $ 1,003 $ 813
Interest cost 1,411 1,373 1,195
Expected return on plan assets (1,186) (1,089) (960)
Recognized net actuarial loss 750 412 280
Net periodic pension cost $ 2,275 $ 1,699 $ 1,328