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Supplemental Retirement Plan and Related Post Retirement Benefits (Details 3) (SERP [Member])
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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SERP [Member]
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| Assumptions used to Determine the Net Periodic Cost | |||
| Discount Rate | 4.50% | 5.50% | 6.00% |
| Future Average Compensation Increases | 5.00% | 5.00% | 5.00% |
| X | ||||||||||
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- Definition
The interest rate used to adjust for the time value of money. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Expected rate of compensation increases (for pay-related plans). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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