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Shareholders' Equity (Details 2) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Restricted Stock Awards |  |
Information pertaining to stock based awards |  |
Remaining shares of common stock available for future issuance | 1,100,000 |
RSUs |  |
Information pertaining to stock based awards |  |
Remaining shares of common stock available for future issuance | 981,000 |
SSAR Awards |  |
Information pertaining to stock based awards |  |
Expiration period | 7 years |
Remaining shares of common stock available for future issuance | 422,000 |
Stock Deferral Plan | Non-employee director |  |
Information pertaining to stock based awards |  |
Number of shares equivalent to each stock unit | 1 |
Fair market value of number of shares of common stock used in the calculation of stock units to be credited to each participant as of each cash dividend payment date (in shares) | 1 |
Stock units outstanding (in shares) | 25,000 | 25,000
Aggregate carrying value of the outstanding stock units | $ 0.3 | $ 0.3
2006 Plan |  |
Information pertaining to stock based awards |  |
Common stock authorized for issuance (in shares) | 4,900,000 |
Remaining shares of common stock available for future issuance | 3,824,000 |

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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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