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Fair Value - Recurring Fair Value Measures (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Investments [Abstract] |  |  |  |  |
Cash Equivalents | $ 3,400,000 | [1] |  | $ 34,200,000 | [1]
Fair Value [Abstract] |  |  |  |  |
Fair Value Activity in Level 3 | 0 |  | 0 |  |
Fair Value Hierarchy Transfers, All Levels | 0 |  | 0 |  |
Recurring Fair Value Measurements [Member] |  |  |  |  |
Investments [Abstract] |  |  |  |  |
Available-for-sale - Equity Securities | 8,400,000 | [2] |  | 7,900,000 | [2]
Available-for-sale - Corporate Debt Securities | 10,500,000 | [2] |  | 9,800,000 | [2]
Cash Equivalents | 3,400,000 | [2] |  | 34,200,000 | [2]
Total Fair Value of Assets | 22,300,000 |  |  | 51,900,000 |
Liabilities [Abstract] |  |  |  |  |
Deferred Compensation | 17,800,000 | [3] |  | 16,800,000 | [3]
Derivatives - Interest Rate Swap | 500,000 | [4] |  | 600,000 | [4]
Total Fair Value of Liabilities | 18,300,000 |  |  | 17,400,000 |
Total Net Fair Value of Assets (Liabilities) | 4,000,000 |  |  | 34,500,000 |
Recurring Fair Value Measurements [Member] | Level 1 [Member] |  |  |  |  |
Investments [Abstract] |  |  |  |  |
Available-for-sale - Equity Securities | 8,400,000 | [2] |  | 7,900,000 | [2]
Available-for-sale - Corporate Debt Securities | 0 | [2] |  | 0 | [2]
Cash Equivalents | 3,400,000 | [2] |  | 34,200,000 | [2]
Total Fair Value of Assets | 11,800,000 |  |  | 42,100,000 |
Liabilities [Abstract] |  |  |  |  |
Deferred Compensation | 0 | [3] |  | 0 | [3]
Derivatives - Interest Rate Swap | 0 | [4] |  | 0 | [4]
Total Fair Value of Liabilities | 0 |  |  | 0 |
Total Net Fair Value of Assets (Liabilities) | 11,800,000 |  |  | 42,100,000 |
Recurring Fair Value Measurements [Member] | Level 2 [Member] |  |  |  |  |
Investments [Abstract] |  |  |  |  |
Available-for-sale - Equity Securities | 0 | [2] |  | 0 | [2]
Available-for-sale - Corporate Debt Securities | 10,500,000 | [2] |  | 9,800,000 | [2]
Cash Equivalents | 0 | [2] |  | 0 | [2]
Total Fair Value of Assets | 10,500,000 |  |  | 9,800,000 |
Liabilities [Abstract] |  |  |  |  |
Deferred Compensation | 17,800,000 | [3] |  | 16,800,000 | [3]
Derivatives - Interest Rate Swap | 500,000 | [4] |  | 600,000 | [4]
Total Fair Value of Liabilities | 18,300,000 |  |  | 17,400,000 |
Total Net Fair Value of Assets (Liabilities) | (7,800,000) |  |  | (7,600,000) |
Recurring Fair Value Measurements [Member] | Level 3 [Member] |  |  |  |  |
Investments [Abstract] |  |  |  |  |
Available-for-sale - Equity Securities | 0 | [2] |  | 0 | [2]
Available-for-sale - Corporate Debt Securities | 0 | [2] |  | 0 | [2]
Cash Equivalents | 0 | [2] |  | 0 | [2]
Total Fair Value of Assets | 0 |  |  | 0 |
Liabilities [Abstract] |  |  |  |  |
Deferred Compensation | 0 | [3] |  | 0 | [3]
Derivatives - Interest Rate Swap | 0 | [4] |  | 0 | [4]
Total Fair Value of Liabilities | 0 |  |  | 0 |
Total Net Fair Value of Assets (Liabilities) | $ 0 |  |  | $ 0 |
[1] | During the first three months of 2014, cash included in Other Investments was transferred to Cash and Cash Equivalents.
[2] | Included in Other Investments on the Consolidated Balance Sheet.
[3] | Included in Other Non-Current Liabilities on the Consolidated Balance Sheet.
[4] | Included in Current Liabilities - Other and Other Non-Current Liabilities on the Consolidated Balance Sheet.

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- Definition This element represents the portion of the balance sheet assertion, Deferred Compensation, valued at fair value by the entity. + References No definition available. + Details
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- Definition Fair Value Activity in Level 3 + References No definition available. + Details
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- Definition The amount of transfers in and out of levels 1, 2, and 3 of the fair value hierarchy during the period. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet Investments line item's cash and cash equivalents, valued at fair value by the entity. + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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- Definition Total of debt securities categorized neither as held-to-maturity nor trading which are intended be sold or mature more than one year from the balance sheet date or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 + Details
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- Definition Equity securities categorized neither as held-to-maturity nor trading which are intended be sold more than one year from the balance sheet date or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity. + References No definition available. + Details
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