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Employee Benefit Plans (Details 9) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Fair Value Total |  |
Fair value of plan assets | $ 30,124 | $ 24,466
Significant Other Observable Inputs (Level 2) |  |
Fair value of plan assets | 441 | 831
Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 29,683 | 23,635
Fixed income investments - Money market funds | Fair Value Total |  |
Fair value of plan assets | 441 | 831
Fixed income investments - Money market funds | Significant Other Observable Inputs (Level 2) |  |
Fair value of plan assets | 441 | 831
Fixed income investments - US government bond fund | Fair Value Total |  |
Fair value of plan assets | 2,995 | 2,356
Fixed income investments - US government bond fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 2,995 | 2,356
Fixed income investments - US corporate bond fund | Fair Value Total |  |
Fair value of plan assets | 3,008 | 2,331
Fixed income investments - US corporate bond fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 3,008 | 2,331
Fixed income investments - US corporate high yield bond fund | Fair Value Total |  |
Fair value of plan assets | 1,563 | 1,195
Fixed income investments - US corporate high yield bond fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 1,563 | 1,195
Equity investments - Large cap value fund | Fair Value Total |  |
Fair value of plan assets | 6,101 | 5,194
Equity investments - Large cap value fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 6,101 | 5,194
Equity investments - Large cap growth fund | Fair Value Total |  |
Fair value of plan assets | 6,020 | 4,883
Equity investments - Large cap growth fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 6,020 | 4,883
Equity investments - Small cap growth fund | Fair Value Total |  |
Fair value of plan assets | 2,514 | 2,030
Equity investments - Small cap growth fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 2,514 | 2,030
Equity investments - Mid cap growth fund | Fair Value Total |  |
Fair value of plan assets | 3,153 | 2,491
Equity investments - Mid cap growth fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 3,153 | 2,491
Equity investments - Foreign equity fund | Fair Value Total |  |
Fair value of plan assets | 3,147 | 2,328
Equity investments - Foreign equity fund | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | 3,147 | 2,328
Equity investments - Company stock | Fair Value Total |  |
Fair value of plan assets | 1,182 | 827
Equity investments - Company stock | Quoted Prices in Market for Identical Assets (Level 1) |  |
Fair value of plan assets | $ 1,182 | $ 827

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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 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 3: 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 4: 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 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=21915506&loc=d3e1928-114920 + Details
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