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Pension Plans and Other Postretirement Benefits (Details 2) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2012 | Dec. 31, 2011
Defined Benefit Plan [Member] |  |
Contributions made and expected full year contributions for the Company's plans |  |
Minimum funding requirement for 2012 | $ 1,000 |
Defined benefit plan Contributions | 373 |
Expected contributions (approximations) |  |
Expected contributions (approximations) for the full fiscal year, as of the time of this form 10-Q | 2,300 |
Expected contributions (approximations) for the full fiscal year, as of the time of the prior year-end 10-K |  | 2,300
Supplemental Defined Benefit Plans [Member] |  |
Contributions made and expected full year contributions for the Company's plans |  |
Defined benefit plan Contributions | 657 |
Expected contributions (approximations) |  |
Expected contributions (approximations) for the full fiscal year, as of the time of this form 10-Q | 1,300 |
Expected contributions (approximations) for the full fiscal year, as of the time of the prior year-end 10-K |  | 1,300
Postretirement Benefit Plans [Member] |  |
Contributions made and expected full year contributions for the Company's plans |  |
Defined benefit plan Contributions | 270 |
Expected contributions (approximations) |  |
Expected contributions (approximations) for the full fiscal year, as of the time of this form 10-Q | 519 |
Expected contributions (approximations) for the full fiscal year, as of the time of the prior year-end 10-K |  | $ 519

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- Definition Defined benefit plan and other post retirement plan expected contribution for the full current fiscal year as of the last fiscal year-end. + References No definition available. + Details
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- Definition Defined benefit plan and other post retirement plan expected contributions for the full current fiscal year. + References No definition available. + Details
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- Definition The increase in the fair value of plan assets from contributions made by the employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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