| 2013 | 2012 | 2011 | ||||||
| Discount rate for determining projected benefit obligation at December 31 | 5.00 | % | 4.30 | % | 5.30 | % | ||
| Discount rate in effect for determining net cost | 4.30 | % | 5.30 | % | 5.80 | % | ||
| Long-term rate of return on plan assets | 7.75 | % | 8.25 | % | 8.25 | % | ||
| Composite rate of compensation increase for determining projected benefit obligation | 3.00 | % | 3.00 | % | 4.00 | % | ||
| Composite rate of compensation increase for determining net pension cost (benefit) | 3.00 | % | 4.00 | % | 4.00 | % |