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Employee Benefits Allocation of Plan Assets (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Allocation of Plan Assets |  |
Defined Benefit Plan, Target Plan Asset Allocations | 100.00% |
Defined Benefit Plan, Actual Plan Asset Allocations | 100.00% | 100.00%
Equity securities |  |
Allocation of Plan Assets |  |
Defined Benefit Plan, Target Plan Asset Allocations | 23.00% |
Defined Benefit Plan, Actual Plan Asset Allocations | 22.00% | 20.00%
Fixed income securities |  |
Allocation of Plan Assets |  |
Defined Benefit Plan, Target Plan Asset Allocations | 48.00% |
Defined Benefit Plan, Actual Plan Asset Allocations | 44.00% | 47.00%
Real estate |  |
Allocation of Plan Assets |  |
Defined Benefit Plan, Target Plan Asset Allocations | 5.00% |
Defined Benefit Plan, Actual Plan Asset Allocations | 5.00% | 1.00%
Other plan assets |  |
Allocation of Plan Assets |  |
Defined Benefit Plan, Target Plan Asset Allocations | 24.00% |
Defined Benefit Plan, Actual Plan Asset Allocations | 29.00% | 32.00%

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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 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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