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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2011
Fair Value Measurements [Abstract] |
Schedule of fair Value, Assets and Liabilities Measured on Recurring basis | The following table provides the financial assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2011 and 2010:
| Total Fair Value |  |  |  |  |  |
|  | Level 1 |  | Level 2 |  | Level 3
December 31, 2011 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Assets held in rabbi trusts | $31,698 |  | $20,569 |  | $11,129 |  | $-
Available for sale securities | $6,776 |  | 6,776 |  | - |  | -
U.S. Defined Benefit Pension Plan Assets: |  |  |  |  |  |  |
Equity securities | $138,379 |  | 138,379 |  | - |  | -
Fixed income securities | $93,842 |  | 40,606 |  | 53,236 |  | -
Real Estate Investment Trust securities | $6,486 |  | 6,486 |  | - |  | -
Cash and cash equivalents | $338 |  | 338 |  | - |  | -
Non - U.S. Defined Benefit Pension Plan Assets: |  |  |  |  |  |  |
Equity securities | $6,815 |  | 6,815 |  | - |  | -
Fixed income securities | $10,173 |  | 10,173 |  | - |  | -
Cash and cash equivalents | $18,556 |  | 18,556 |  | - |  | -
| $313,063 |  | $248,698 |  | $64,365 |  | $-
Liabilities: |  |  |  |  |  |  |
Embedded derivative - convertible debentures due 2040 | $(594) |  | - |  | - |  | (594)
Embedded derivative - convertible debentures due 2041 | $(392) |  | - |  | - |  | (392)
| $(986) |  | $- |  | $- |  | $(986)
December 31, 2010 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Assets held in rabbi trusts | $25,585 |  | $15,575 |  | $10,010 |  | $-
Available for sale securities | $5,736 |  | 5,736 |  | - |  | -
U.S. Defined Benefit Pension Plan Assets: |  |  |  |  |  |  |
Equity securities | $142,808 |  | 142,808 |  | - |  | -
Fixed income securities | $87,233 |  | 39,063 |  | 48,170 |  | -
Real Estate Investment Trust securities | $6,339 |  | 6,339 |  | - |  | -
Cash and cash equivalents | $2,143 |  | 2,143 |  | - |  | -
Non - U.S. Defined Benefit Pension Plan Assets: |  |  |  |  |  |  |
Equity securities | $7,751 |  | 7,751 |  | - |  | -
Fixed income securities | $8,538 |  | 8,538 |  | - |  | -
Cash and cash equivalents | $16,172 |  | 16,172 |  | - |  | -
| $302,305 |  | $244,125 |  | $58,180 |  | $-
Liability: |  |  |  |  |  |  |
Embedded derivative - convertible debentures due 2040 | $(319) |  | - |  | - |  | (319)

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 820 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258 + Details
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