| **Pension and Other Post Retirement Benefit Plans Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Level (Details) (USD $)In Thousands, unless otherwise specified** | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|---------------|
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | $ 62,865      | $ 62,078      | $ 63,275      |
| Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                                                   |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 45,296        |          |          |
| Significant Other Observable Inputs (Level 2)                                                                                                                                                    |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 17,569        |          |          |
| Cash and cash equivalents | Fair Value                                                                                                                                                           |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 795           |          |          |
| Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                       |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 795           |          |          |
| Corporate Bonds and Notes | Fair Value                                                                                                                                                           |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 6,157         |          |          |
| Corporate Bonds and Notes | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                       |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 6,157         |          |          |
| Government Agency and Municipal Bonds and Notes | Fair Value                                                                                                                                     |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 8,642         |          |          |
| Government Agency and Municipal Bonds and Notes | Significant Other Observable Inputs (Level 2)                                                                                                  |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 8,642         |          |          |
| Certificates of Deposit | Fair Value                                                                                                                                                             |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 357           |          |          |
| Certificates of Deposit | Significant Other Observable Inputs (Level 2)                                                                                                                          |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 357           |          |          |
| Preferred | Fair Value                                                                                                                                                                           |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 52            |          |          |
| Preferred | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                                       |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 52            |          |          |
| Common Stock | Fair Value                                                                                                                                                                        |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 898           |          |          |
| Common Stock | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                                    |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 898           |          |          |
| Common Bond Fund | Fair Value                                                                                                                                                                    |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 4,075         |          |          |
| Common Bond Fund | Significant Other Observable Inputs (Level 2)                                                                                                                                 |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 4,075         |          |          |
| Common Equity Fund | Fair Value                                                                                                                                                                  |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 4,495         |          |          |
| Common Equity Fund | Significant Other Observable Inputs (Level 2)                                                                                                                               |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 4,495         |          |          |
| Taxable Bond | Fair Value                                                                                                                                                                        |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 7,409         |          |          |
| Taxable Bond | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                                    |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 7,409         |          |          |
| Large Cap Equity | Fair Value                                                                                                                                                                    |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 16,166        |          |          |
| Large Cap Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                                |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 16,166        |          |          |
| Mid Cap Equity | Fair Value                                                                                                                                                                      |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 6,772         |          |          |
| Mid Cap Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                                  |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 6,772         |          |          |
| Small Cap Equity | Fair Value                                                                                                                                                                    |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 2,640         |          |          |
| Small Cap Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                                |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 2,640         |          |          |
| International Equity | Fair Value                                                                                                                                                                |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 3,178         |          |          |
| International Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                            |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 3,178         |          |          |
| Specialty Alternative Equity | Fair Value                                                                                                                                                        |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | 1,229         |          |          |
| Specialty Alternative Equity | Quoted Prices in Active Markets for Identical Assets (Level 1)                                                                                                    |          |          |          |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                                                                 |          |          |          |
| Fair Value of Plan Assets                                                                                                                                                                        | $ 1,229       |          |          |

| X                                                                                                                                                                         |
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| - Details**Name:**us-gaap_DefinedBenefitPlanDisclosureLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
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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=d3e12355-114930Reference 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
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