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Stockholders' Equity (Details) | 1 Months Ended |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Common Stock [Member] | Dec. 31, 2011 Common Stock [Member] | Dec. 31, 2010 Common Stock [Member] | Dec. 31, 2012 Treasury Stock [Member] | Dec. 31, 2011 Treasury Stock [Member] | Dec. 31, 2010 Treasury Stock [Member]
Stockholders' Equity |  |  |  |  |  |  |  |  |
Common Stock, at January 1 |  | 29,554,500 | 29,554,500 | 29,555,000 | 29,555,000 | 29,555,000 |  |  |
Treasury Stock, at January 1 |  |  |  |  |  |  | 6,507,000 | 5,851,000 | 5,890,000
Exercise of options |  |  |  | 0 | 0 | 0 |  |  |
Exercise of options, Treasury Stock |  |  |  |  |  |  | (333,000) | (236,000) | (186,000)
Stock purchases |  |  |  | 0 | 0 | 0 |  |  |
Stock purchases, Treasury Stock |  |  |  |  |  |  | 48,000 | 1,087,000 | 147,000
Settlement of New Market | 195,313 |  |  | 0 | 0 | 0 |  |  |
Settlement of New Market, Treasury Stock |  |  |  |  |  |  | 0 | (195,000) | 0
Common Stock, at December 31 |  | 29,554,500 | 29,554,500 | 29,555,000 | 29,555,000 | 29,555,000 |  |  |
Treasury Stock, at December 31 |  |  |  |  |  |  | 6,222,000 | 6,507,000 | 5,851,000

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 11A -Chapter 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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -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 SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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