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Retirement Agreements And Other Postretirement Benefits (Tables) | 6 Months Ended
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Jun. 30, 2012
Retirement Agreements And Other Postretirement Benefits [Abstract] |
Components Of Net Periodic Benefits Cost |
| For the Three Months Ended June 30, | For the Six Months Ended June 30,
| 2012 | 2011 | 2012 | 2011
Service cost – benefits earned during the year | $ | 3,154 | $ | 6,425 | $ | 6,308 | $ | 12,849
Interest cost on the projected benefit obligation |  | 6,967 |  | 7,689 |  | 13,934 |  | 15,378
Amortization of unrecognized prior service cost |  | 2,349 |  | 5,097 |  | 4,698 |  | 10,194
Amortization of unrecognized gains |  | 170 |  | 643 |  | 340 |  | 1,286
Net periodic benefits costs | $ | 12,640 | $ | 19,854 | $ | 25,280 | $ | 39,707

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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