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Stock-Based Compensation Plans and Employee Benefits (Details 5) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |
Service requirement | 3 months |  |
Employer matching contribution, percent of match | 50.00% |  |
Employer matching contribution, percent of employee contribution | 10.00% |  |
Gross contributions made by the Company | $ 0.9 | $ 0.9 | $ 1.1

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- Definition Represents the maximum percentage of a participant's annual compensation upon which the matching Company contribution is based. + References No definition available. + Details
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- Definition At the discretion of the Board of Directors, represents the maximum percentage matching contribution which the Company may make of the first ten percent of the participant's annual compensation. + References No definition available. + Details
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- Definition Represents the period of continuous service with the Company required in order to be eligible to participate in the 401(k) Plan. + References No definition available. + Details
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Balance Type: | na
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Details
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