XML 108 R93.htm IDEA: XBRL DOCUMENT v2.4.0.8
Retirement Plans and Other Post-Retirement Benefits - Schedule of Defined Benefit Plan Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost (Detail)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pension Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - benefit expense 4.28% 5.09% 5.81%
Future compensation growth rate 4.00% 4.00% 4.00%
Expected long-term rate of return on plan assets 8.50% 8.50% 8.50%
Other Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - benefit expense 3.58% 4.45% 5.12%
Expected long-term rate of return on plan assets   8.50% 8.50%