Retirement Benefit Plans (Schedule of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension expense, rate of compensation increase	3.00%	3.00%
Supplemental Employee Retirement Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.60%	3.37%
Composite rate of compensation increase	3.00%	3.00%
Net periodic pension expense, discount rate	3.37%	4.04%
Hourly Employees’ Pension Plan | Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.60%	3.55%
Net periodic pension expense, discount rate	3.55%	4.06%
Net periodic pension expense, Long-term rate of return on plan assets	7.25%	7.75%
Employees’ Retirement Plan | Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.75%	3.70%
Net periodic pension expense, discount rate	3.70%	4.18%
Net periodic pension expense, Long-term rate of return on plan assets	7.25%	7.75%