XML 46 R60.htm IDEA: XBRL DOCUMENT v2.3.0.15
Retirement Plans (Weighted-Average Expense Assumptions) (Details)
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Retirement Income Plan [Member]
  
Discount rate5.55%5.93%
Expected return on plan assets8.00%8.00%
Rate of compensation increase4.00%4.00%
Retirement Life Plan [Member]
  
Discount rate5.55%5.93%
Expected return on plan assets0.00%0.00%
Rate of compensation increase0.00%0.00%