Pension And Postretirement Benefits (Summary Of Pension Plan Assets Valued Using Net Asset Value (NAV) Or Its Equivalent) (Details) (Pension Benefits [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Archstone Offshore Fund, Ltd [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 35,590	[1],[2]	$ 30,605	[1],[2]
Redemption Frequency	12 Months	[1]	12 Months	[1]
Unfunded Commitment	None	[1]	None	[1]
Other Redemption Restrictions	None	[1]	None	[1]
Redemption Notice Period	90 days written	[1]	90 days written	[1]
Evanston Capital Management [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	29,032	[1],[2]	25,587	[1],[2]
Redemption Frequency	12 Months	[1]	12 Months	[1]
Unfunded Commitment	None	[1]	None	[1]
Other Redemption Restrictions	None	[1]	None	[1]
Redemption Notice Period	60 days written	[1]	65 days written	[1]
Strategic Value Fund [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	7,430	[2],[3]	17,238	[2],[3]
Redemption Frequency	12 Months	[3]	12 Months	[3]
Unfunded Commitment	None	[3]	None	[3]
Other Redemption Restrictions	None	[3]	None	[3]
Redemption Notice Period	90 days written	[3]	90 days written	[3]
U.S. Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	103,606	[2],[4]	80,171	[2],[4]
Redemption Frequency	immediate	[4]	immediate	[4]
Unfunded Commitment	None	[4]	None	[4]
Other Redemption Restrictions	None	[4]	None	[4]
Redemption Notice Period	None	[4]	None	[4]
Non-U.S. Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	220,794	[2],[5]	178,841	[2],[5]
Redemption Frequency	immediate	[5]	immediate	[5]
Unfunded Commitment	None	[5]	None	[5]
Other Redemption Restrictions	None	[5]	None	[5]
Redemption Notice Period	None	[5]	None	[5]
Non-U.S. Fixed Income, Government And Corporate [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	141,407	[2],[6]	181,073	[2],[6]
Redemption Frequency	immediate	[6]	immediate	[6]
Unfunded Commitment	None	[6]	None	[6]
Other Redemption Restrictions	None	[6]	None	[6]
Redemption Notice Period	None	[6]	None	[6]
International Property Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	38,449	[2],[7]	9,445	[2],[7]
Redemption Frequency	immediate	[7]	immediate	[7]
Unfunded Commitment	None	[7]	None	[7]
Other Redemption Restrictions	None	[7]	None	[7]
Redemption Notice Period	None	[7]	None	[7]
International Balanced Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	54,724	[2],[8]	8,836	[2],[8]
Redemption Frequency	immediate	[8]	immediate	[8]
Unfunded Commitment	None	[8]	None	[8]
Other Redemption Restrictions	None	[8]	None	[8]
Redemption Notice Period	None	[8]	None	[8]
U.S. Government and Corporate Fixed Income [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	32,720	[2],[9]	43,182	[2],[9]
Redemption Frequency	immediate	[9]	immediate	[9]
Unfunded Commitment	None	[9]	None	[9]
Other Redemption Restrictions	None	[9]	None	[9]
Redemption Notice Period	None	[9]	None	[9]
U.S. Tactical Allocation Balanced Fund [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 15,845	[10],[2]	$ 18,997	[10],[2]
Redemption Frequency	immediate	[10]	immediate	[10]
Unfunded Commitment	None	[10]	None	[10]
Other Redemption Restrictions	None	[10]	None	[10]
Redemption Notice Period	None	[10]	None	[10]

[1] These funds are alternative assets which seeks to outperform equities while maintaining a lower risk profile than equities.

[2] The fair values of the investments have been estimated using the net asset value of the investment

[3] This fund is an alternative investment that invests in distressed debt instruments seeking price appreciation.

[4] These funds invest in U.S. equity securities and seeks to meet or exceed relative benchmarks.

[5] These funds invest in equity securities outside the U.S. and seek to meet or exceed relative benchmarks.

[6] These funds invest in Corporate and Governments fixed income securities outside the U.S. and seek to meet or exceed relative benchmarks

[7] These funds invest in real property outside the U.S.

[8] These funds invest in a pre defined mix of non-U.S. equity and non-U.S. fixed income securities and seek to meet or exceed the performance of a passive/local benchmark of similar mixes.

[9] These funds invest in U.S. fixed income securities, corporate, government and agency, and seek to outperform the Barclays Capital Aggregate Index.

[10] These funds invest in a blend of equities, fixed income, cash and property in the U.S. and seek to outperform a similarly weighted index.