Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Schedule of Estimated Future Beneffit Payments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Other Postretirement Benefit Plans, Defined Benefit [Member]
2014	$ 4,929
2015	4,835
2016	4,699
2017	4,490
2018	4,248
2019 through 2022	17,734
Pension Plans, Defined Benefit [Member]
2014	30,033
2015	29,836
2016	29,566
2017	29,287
2018	29,064
2019 through 2022	$ 143,152