v2.4.0.6

Employee Benefits (Schedule Of Fair Value Of Pension Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2011 Large-Cap Index Funds [Member] | Dec. 31, 2011 Small-Cap Index Funds [Member] | Dec. 31, 2011 International Index Funds [Member] | Dec. 31, 2011 Level 2 [Member] | Dec. 31, 2010 Level 2 [Member] | Dec. 31, 2011 Level 3 [Member] | Dec. 31, 2010 Level 3 [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Equity Securities [Member] Large-Cap Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Large-Cap Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Equity Securities [Member] Small-Cap Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Small-Cap Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Equity Securities [Member] International Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] International Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Equity Securities [Member] Level 2 [Member] Large-Cap Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Level 2 [Member] Large-Cap Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Equity Securities [Member] Level 2 [Member] Small-Cap Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Level 2 [Member] Small-Cap Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Equity Securities [Member] Level 2 [Member] International Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Level 2 [Member] International Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Level 3 [Member] Large-Cap Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Level 3 [Member] Small-Cap Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Equity Securities [Member] Level 3 [Member] International Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Fixed Income [Member] Bond Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Fixed Income [Member] Bond Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Fixed Income [Member] Short Term Investment Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Fixed Income [Member] Short Term Investment Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Fixed Income [Member] Level 2 [Member] Bond Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Fixed Income [Member] Level 2 [Member] Bond Index Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Fixed Income [Member] Level 2 [Member] Short Term Investment Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Fixed Income [Member] Level 3 [Member] Bond Index Funds [Member] | Dec. 31, 2011 Bank Collective Trust Funds - Fixed Income [Member] Level 3 [Member] Short Term Investment Funds [Member] | Dec. 31, 2010 Bank Collective Trust Funds - Fixed Income [Member] Level 3 [Member] Short Term Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets | $ 35,478 | $ 32,867 |  |  |  | $ 35,059 | $ 32,400 | $ 419 | $ 467 | $ 17,562 | [1] | $ 15,007 | [1] | $ 2,324 | [2] | $ 3,220 | [2] | $ 3,367 | [3] | $ 3,216 | [3] | $ 17,562 | [1] | $ 15,007 | [1] | $ 2,324 | [2] | $ 3,220 | [2] | $ 3,367 | [3] | $ 3,216 | [3] |  | [1] |  | [2] |  | [3] | $ 11,806 | [4] | $ 10,957 | [4] | $ 419 | $ 467 | $ 11,806 | [4] | $ 10,957 | [4] |  |  | [4] | $ 419 | $ 467
Percentage of assets invested in specified company type |  |  | 90.00% | 95.00% | 90.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Over 90% of the assets of these funds are invested in large-cap U.S. companies. The remainder of the assets of these funds is invested in cash reserves.
[2] | Over 95% of the assets of these funds are invested in small-cap U.S. companies. The remainder of the assets of these funds is invested in cash reserves.
[3] | At least 90% of the assets of these funds are invested in international companies in developed markets (excluding the U.S. and Canada). The remainder of the assets of these funds is invested in cash reserves.
[4] | This category represents investment grade bonds of U.S. issuers, including U.S. Treasury notes.

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) -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 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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