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Pension Plans and Other Postretirement Benefits (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013
Defined Benefit Plan [Member] |
Summary of minimum funding requirement, contributions made and the expected full year contributions for the Company's plans |
Minimum funding requirement for 2013 |
Expected contributions (approximations) for the year ended December 31, 2013 as of the time of: |
This Form 10-Q (1) | 3,000
2012 Form 10-K (2) | 2,500
Supplemental Defined Benefit Plans [Member] |
Summary of minimum funding requirement, contributions made and the expected full year contributions for the Company's plans |
Minimum funding requirement for 2013 |
Contributions made in the three months ended March 31, 2013 | 328
Expected contributions (approximations) for the year ended December 31, 2013 as of the time of: |
This Form 10-Q (1) | 1,320
2012 Form 10-K (2) | 1,320
Other Postretirement Benefits [Member] |
Summary of minimum funding requirement, contributions made and the expected full year contributions for the Company's plans |
Minimum funding requirement for 2013 |
Contributions made in the three months ended March 31, 2013 | 33
Expected contributions (approximations) for the year ended December 31, 2013 as of the time of: |
This Form 10-Q (1) | 480
2012 Form 10-K (2) | $ 480

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- Definition Defined benefit plan and other post retirement plan expected contribution as of last fiscal year end. + References No definition available. + Details
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- Definition Defined benefit plan and other post retirement plan expected contribution full current fiscal year. + References No definition available. + Details
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- Definition Defined benefit plan and other post retirement plan minimum funding required. + 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Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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