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Employee Benefit Plans (Details 8) | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2012 Equity Securities | Dec. 31, 2012 Debt Securities | Dec. 31, 2012 Cash | Dec. 31, 2012 Commodities | Dec. 31, 2012 Pension Benefit Plan | Dec. 31, 2011 Pension Benefit Plan | Dec. 31, 2012 Pension Benefit Plan Equity Securities | Dec. 31, 2011 Pension Benefit Plan Equity Securities | Dec. 31, 2012 Pension Benefit Plan Debt Securities | Dec. 31, 2011 Pension Benefit Plan Debt Securities | Dec. 31, 2012 Pension Benefit Plan Cash | Dec. 31, 2011 Pension Benefit Plan Cash | Dec. 31, 2012 Pension Benefit Plan Commodities | Dec. 31, 2011 Pension Benefit Plan Commodities | Dec. 31, 2012 Other Benefits Plan | Dec. 31, 2011 Other Benefits Plan | Dec. 31, 2012 Other Benefits Plan Equity Securities | Dec. 31, 2011 Other Benefits Plan Equity Securities | Dec. 31, 2012 Other Benefits Plan Debt Securities | Dec. 31, 2011 Other Benefits Plan Debt Securities | Dec. 31, 2012 Other Benefits Plan Cash | Dec. 31, 2011 Other Benefits Plan Cash | Dec. 31, 2012 Other Benefits Plan Commodities | Dec. 31, 2011 Other Benefits Plan Commodities
Allocation of plan assets |  |  |  |  | 100.00% | 100.00% | 60.90% | 61.60% | 32.90% | 31.30% | 6.00% | 6.90% | 0.20% | 0.20% | 100.00% | 100.00% | 40.30% | 37.00% | 53.00% | 57.80% | 5.90% | 4.60% | 0.80% | 0.60%
Target plan allocations | 60.00% | 38.00% | 2.00% | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Target plan allocations, minimum | 30.00% | 25.00% | 0.00% | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Target plan allocations, maximum | 65.00% | 70.00% | 10.00% | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + 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 (d)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 + Details
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- Definition Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis. + 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 (d)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) -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. + Details
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