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Employee Benefit Plans (Details 5) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Fair value of the pension plan assets by asset category |  |  |
Total | $ 11,707 | $ 10,034 | $ 9,296
Pension plans, defined benefit [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 11,707 | 10,034 |
Pension plans, defined benefit [Member] | Cash equivalents [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 485 | 1,791 |
Pension plans, defined benefit [Member] | U.S. large-cap (a) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 4,335 | 3,821 |
Pension plans, defined benefit [Member] | U.S. mid-cap (b) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 575 | 502 |
Pension plans, defined benefit [Member] | U.S. small-cap (c) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 635 | 595 |
Pension plans, defined benefit [Member] | International (d) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 1,670 | 1,278 |
Pension plans, defined benefit [Member] | Real estate (e) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 395 | 203 |
Pension plans, defined benefit [Member] | Commodities (f) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 370 | 198 |
Pension plans, defined benefit [Member] | U.S. gov't agency obligations (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 2,726 | 841 |
Pension plans, defined benefit [Member] | Corporate investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 416 | 653 |
Pension plans, defined benefit [Member] | Corporate non-investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 100 | 152 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 8,465 | 8,388 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash equivalents [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 485 | 1,791 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. large-cap (a) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 4,335 | 3,821 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. mid-cap (b) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 575 | 502 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. small-cap (c) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 635 | 595 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | International (d) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 1,670 | 1,278 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Real estate (e) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 395 | 203 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commodities (f) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 370 | 198 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. gov't agency obligations (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate non-investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 3,242 | 1,646 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | Cash equivalents [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | U.S. large-cap (a) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | U.S. mid-cap (b) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | U.S. small-cap (c) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | International (d) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | Real estate (e) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | Commodities (f) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | U.S. gov't agency obligations (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 2,726 | 841 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | Corporate investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 416 | 653 |
Pension plans, defined benefit [Member] | Other Observable Inputs (Level 2) [Member] | Corporate non-investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 100 | 152 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | Cash equivalents [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. large-cap (a) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. mid-cap (b) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. small-cap (c) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | International (d) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | Real estate (e) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commodities (f) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. gov't agency obligations (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | 0 | 0 |
Pension plans, defined benefit [Member] | Significant Unobservable Inputs (Level 3) [Member] | Corporate non-investment grade (g) [Member] |  |  |
Fair value of the pension plan assets by asset category |  |  |
Total | $ 0 | $ 0 |

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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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