Quarterly report pursuant to Section 13 or 15(d)

Employee Retirement Plans (Details)

v2.4.0.6
Employee Retirement Plans (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
Pension cost
       
Components of net periodic cost:        
Service cost $ 67 $ 240 $ 201 $ 720
Interest cost 370 385 1,110 1,155
Expected return on plan assets (318) (339) (954) (1,017)
Amortization of net (gain) loss 192 113 576 339
Net periodic cost 311 399 933 1,197
Cash contributions     2,014 1,570
Pension cost | Annual estimate | Minimum
       
Components of net periodic cost:        
Estimated total required contributions 2,014   2,014  
Other postretirement benefit cost
       
Components of net periodic cost:        
Service cost 70 66 210 197
Interest cost 90 102 270 306
Amortization of net (gain) loss (4) (15) (12) (46)
Net periodic cost $ 156 $ 153 $ 468 $ 457