Pensions And Other Employee Benefits (Fair Values Of Pension Plan Assets) (Details) (USD $)	Dec. 31, 2011		Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 299,292,000		$ 289,036,000
Equities, Actual Allocation	58.00%		61.00%
Fixed Income, Actual Allocation	42.00%		39.00%
Pension plans' actual asset allocations	100.00%		100.00%
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	4,938,000		5,032,000
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	239,923,000		267,200,000
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	54,431,000		16,804,000
Private Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments in venture capital fund	6,450,000		7,300,000
Committed amount to invest in venture capital fund	10,000,000
Remaining outstanding commitment in private equity fund	1,550,000
Distressed Opportunity Limited Partnership [Member]
Defined Benefit Plan Disclosure [Line Items]
Discounted debt Securities, bank loans, trade claims and other debt and equity securities subject to lock-up period	2,000,000
Expiration of lock-up period	June 2012
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	173,945,000		174,896,000
Equities, Actual Allocation	58.00%		61.00%
Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	4,938,000		5,032,000
Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	139,745,000		157,048,000
Equity Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	29,262,000		12,816,000
Equity Securities [Member] | U.S. Large-Cap Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	60,813,000	[1]	86,866,000	[1]
Equities, Actual Allocation	20.00%	[1]	30.00%	[1]
Equity Securities [Member] | U.S. Large-Cap Equities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	60,813,000	[1]	86,866,000	[1]
Equity Securities [Member] | U.S. Small-Cap Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	18,010,000	[2]	16,002,000	[2]
Equities, Actual Allocation	6.00%	[2]	6.00%	[2]
Equity Securities [Member] | U.S. Small-Cap Equities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	3,901,000	[2]	3,783,000	[2]
Equity Securities [Member] | U.S. Small-Cap Equities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	14,109,000	[2]	12,219,000	[2]
Equity Securities [Member] | Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	20,273,000	[3]
Equities, Actual Allocation	7.00%	[3]
Equity Securities [Member] | Global Equities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	20,273,000	[3]
Equity Securities [Member] | Non-U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	33,781,000	[4]	53,101,000	[4]
Equities, Actual Allocation	11.00%	[4]	18.00%	[4]
Equity Securities [Member] | Non-U.S. Equities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	1,037,000	[4]	1,249,000	[4]
Equity Securities [Member] | Non-U.S. Equities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	32,744,000	[4]	51,852,000	[4]
Equity Securities [Member] | Equity Long/Short Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	16,509,000	[5]	11,993,000	[5]
Equities, Actual Allocation	6.00%	[5]	4.00%	[5]
Equity Securities [Member] | Equity Long/Short Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	5,952,000	[5]	6,111,000	[5]
Equity Securities [Member] | Equity Long/Short Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	10,557,000	[5]	5,882,000	[5]
Equity Securities [Member] | Real Estate Securities Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	17,689,000	[6]
Equities, Actual Allocation	6.00%	[6]
Equity Securities [Member] | Real Estate Securities Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	5,854,000	[6]
Equity Securities [Member] | Real Estate Securities Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	11,835,000	[6]
Equity Securities [Member] | Private Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	6,870,000	[7]	6,934,000	[7]
Equities, Actual Allocation	2.00%	[7]	2.00%	[7]
Equity Securities [Member] | Private Equity Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Equtiy securities	6,870,000	[7]	6,934,000	[7]
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	125,347,000		114,140,000
Fixed Income, Actual Allocation	42.00%		39.00%
Fixed Income Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	100,178,000		110,152,000
Fixed Income Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	25,169,000		3,988,000
Fixed Income Securities [Member] | Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	100,178,000	[8]	110,152,000	[8]
Fixed Income, Actual Allocation	33.00%	[8]	38.00%	[8]
Fixed Income Securities [Member] | Commingled Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	100,178,000	[8]	110,152,000	[8]
Fixed Income Securities [Member] | Distressed Opportunity Limited Partnership [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	5,217,000	[9]	3,598,000	[9]
Fixed Income, Actual Allocation	2.00%	[9]	1.00%	[9]
Fixed Income Securities [Member] | Distressed Opportunity Limited Partnership [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	5,217,000	[9]	3,598,000	[9]
Fixed Income Securities [Member] | Multi-Strategy Limited Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	19,916,000	[10]
Fixed Income, Actual Allocation	7.00%	[10]
Fixed Income Securities [Member] | Multi-Strategy Limited Partnerships [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	19,916,000	[10]
Fixed Income Securities [Member] | Diversified Alternatives Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		[11]	353,000	[11]
Fixed Income, Actual Allocation		[11]	0.00%	[11]
Fixed Income Securities [Member] | Diversified Alternatives Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		[11]
Fixed Income Securities [Member] | Diversified Alternatives Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		[11]
Fixed Income Securities [Member] | Diversified Alternatives Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		[11]	353,000	[11]
Fixed Income Securities [Member] | Other Limited Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	36,000	[12]	37,000	[12]
Fixed Income, Actual Allocation			0.00%	[12]
Fixed Income Securities [Member] | Other Limited Partnerships [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	$ 36,000	[12]	$ 37,000	[12]

[1] Investments in common stocks that rank among the largest 1,000 companies in the U.S. stock market.

[2] Investments in common stocks that rank among the small capitalization stocks in the U.S. stock market.

[3] Investments in common stocks across the world without being limited by national borders or to specific regions.

[4] Investments in common stocks of companies from developed and emerging countries outside the United States.

[5] Investments primarily in long and short positions in equity securities of U.S. and non-U.S. companies. We are invested in two funds; one fund has semi-annual tender offer redemption periods on June 30 and December 31and is reported on a one month lag. The other fund has no limitations on redemptions and is reported on a current basis.

[6] Investments in real estate through both the private and public sector. The pension plan is invested in two funds of funds. One fund invests in global public real estate securities (REITs) while the second fund invests in private real estate investments. The private real estate fund is valued on a quarterly lag.

[7] Fund invests in portfolios of secondary interest in established venture capital, buyout, mezzanine and special situation funds on a global basis. The pension plan committed to invest up to $10 million in this fund. The remaining outstanding commitment at December 31, 2011 is $1.55 million. The amount invested in the fund, net of distributions, is $6.45 million and $7.30 million at December 31, 2011 and 2010, respectively. Fund is valued on a quarterly lag with adjustment for subsequent cash activity.

[8] Investments in bonds representing many sectors of the broad bond market with both short-term and intermediate-term maturities.

[9] Investments mainly in discounted debt securities, bank loans, trade claims and other debt and equity securities of financially troubled companies. This partnership has a one year lock-up period with semi-annual withdrawal rights on June 30 and December 31 thereafter. As of December 31, 2011, $2 million was subject to the lock-up period which will expire in June 2012. This fund is reported on a one month lag.

[10] Investments mainly in partnerships that have multi-strategy investment programs and do not rely on a single investment model. In 2011, the pension plan invested in two limited partnerships that have multi-strategy investment programs. One partnership has quarterly liquidation rights with notice of 65 days while the second partnership has monthly liquidation rights with notice of 33 days. Both funds are reported on a one month lag.

[11] Fund is a fund of hedge funds. Fund was closed and unwound its holdings. At December 31, 2010, the remaining assets were sold with the cash proceeds received in 2011.

[12] The pension plan invested in other partnerships that have reached their end of life and have closed and are unwinding their holdings. Mainly partnerships that provided mezzanine financing.