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Fair Value Measurements Schedule Of Fair Value Of Assets (Details) (USD $)

Sep. 30, 2011

Dec. 31, 2010

Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]

Assets, Fair Value Disclosure

$ 32,018,000

$ 33,366,000

Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Cash and Cash Equivalents [Member] | Money Market Funds [Member]

Cash and Cash Equivalents, Fair Value Disclosure

10,001,000

10,001,000

Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Pension Plans, Defined Benefit [Member] | Money Market Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

2,186,000

^[1]

2,448,000

^[1]

Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] | Pension Plans, Defined Benefit [Member] | Mutual Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

19,831,000

^[1]

20,917,000

^[1]

Fair Value, Measurements, Recurring [Member] | Level 1 [Member]

Assets, Fair Value Disclosure

19,831,000

20,917,000

Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Cash and Cash Equivalents [Member] | Money Market Funds [Member]

Cash and Cash Equivalents, Fair Value Disclosure

0

0

Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Pension Plans, Defined Benefit [Member] | Money Market Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

0

^[1]

0

^[1]

Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Pension Plans, Defined Benefit [Member] | Mutual Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

19,831,000

^[1]

20,917,000

^[1]

Fair Value, Measurements, Recurring [Member] | Level 2 [Member]

Assets, Fair Value Disclosure

12,187,000

12,449,000

Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Cash and Cash Equivalents [Member] | Money Market Funds [Member]

Cash and Cash Equivalents, Fair Value Disclosure

10,001,000

10,001,000

Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Pension Plans, Defined Benefit [Member] | Money Market Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

2,186,000

^[1]

2,448,000

^[1]

Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Pension Plans, Defined Benefit [Member] | Mutual Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

0

^[1]

0

^[1]

Fair Value, Measurements, Recurring [Member] | Level 3 [Member]

Assets, Fair Value Disclosure

0

0

Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Cash and Cash Equivalents [Member] | Money Market Funds [Member]

Cash and Cash Equivalents, Fair Value Disclosure

0

0

Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Pension Plans, Defined Benefit [Member] | Money Market Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

0

^[1]

0

^[1]

Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Pension Plans, Defined Benefit [Member] | Mutual Funds [Member]

Defined Benefit Plan, Fair Value Disclosure

0

^[1]

0

^[1]

Senior Notes [Member]

Debt Instruments, Fair Value Disclosure

$ 276,500,000

$ 244,000,000

[1]	Included in Investments, employee benefit plans fair value on the consolidated balance sheets.

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References+ Details