Pension and Other Post-Retirement Benefit Plans (Cash Flows) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 27,492,000	$ 24,731,000
Estimated future employer contributions	6,300,000
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2013	31,260,000
2014	33,144,000
2015	37,769,000
2016	37,332,000
2017	39,860,000
Years 2018 to 2022	232,378,000
Post-Retirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	1,364,000	974,000
Estimated future employer contributions	900,000
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2013	888,000
2014	844,000
2015	764,000
2016	755,000
2017	749,000
Years 2018 to 2022	$ 3,775,000