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Pension And Postretirement Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012
Defined Benefit Plan Disclosure [Line Items] |  |
Retired employees receiving health care and life insurance benefits | 9 |
Post retirement benefits, age eligibility requirement | 65 years |
Post retirement benefits, service eligibility requirement | 15 years |
Postretirement Benefits [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net periodic benefit cost | $ 1 | $ 1

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- Definition Number Of Retired Employees Provided Health Care And Life Insurance + References No definition available. + Details
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Balance Type: | na
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- Definition Post retirement benefits, age eligibility requirement + References No definition available. + Details
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- Definition Post retirement benefits, service eligibility requirement. + References No definition available. + Details
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- Details
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- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 (h) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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