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Stockholders' Equity and Share Based Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2012
Stockholders' Equity and Share Based Compensation Plans [Abstract] |
Assumptions used to determine the fair value of options |
|  | 2012 |  |  | 2011 |
Dividend yield |  |  | 0.0 | % |  |  | 0.2 | %
Expected life |  |  | 5 years |  |  |  | 5 years |
Volatility |  |  | 60.1 | % |  |  | 78.3 | %
Risk free interest rate |  |  | 0.43 | % |  |  | 1.22 | %
Summary of transactions of the Company's stock option plans |
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Fair Value |
Outstanding at June 30, 2012 |  |  | 1,116,642 |  |  | $ | 6.10 |  |  |  |  |
Granted: |  |  |  |  |  |  |  |  |  |  |  |
At discount |  |  | 4,800 |  |  | $ | 0.00 |  |  | $ | 30.78 |
Exercised |  |  | (64,780 | ) |  | $ | 1.01 |  |  |  |  |
Forfeited |  |  | (1,648 | ) |  | $ | 8.63 |  |  |  |  |
Outstanding at September 30, 2012 |  |  | 1,055,014 |  |  | $ | 6.38 |  |  |  |  |
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Fair Value |
Outstanding at December 31, 2011 |  |  | 1,229,220 |  |  | $ | 5.44 |  |  |  |  |
Granted: |  |  |  |  |  |  |  |  |  |  |  |
At discount |  |  | 75,932 |  |  | $ | 0.00 |  |  | $ | 21.98 |
At market value |  |  | 31,012 |  |  | $ | 29.56 |  |  | $ | 16.70 |
Exercised |  |  | (273,189 | ) |  | $ | 2.92 |  |  |  |  |
Forfeited |  |  | (7,961 | ) |  | $ | 9.78 |  |  |  |  |
Outstanding at September 30, 2012 |  |  | 1,055,014 |  |  | $ | 6.38 |  |  |  |  |
Summary of information about options outstanding |
Range of Exercise Price |  | Number Outstanding |  |  | Weighted Average Remaining Life in Years |  |  | Weighted Average Exercise Price |  |  | Number Exercisable and Fully Vested |  |  | Weighted Average Remaining Life in Years |  |  | Weighted Average Exercise Price |
$0-$5 |  |  | 583,119 |  |  |  | 7.24 |  |  | $ | 0.60 |  |  |  | 139,825 |  |  |  | 6.29 |  |  | $ | 0.74 |
$5-$10 |  |  | 22,654 |  |  |  | 2.75 |  |  | $ | 9.66 |  |  |  | 22,654 |  |  |  | 2.75 |  |  | $ | 9.66 |
$10-$15 |  |  | 385,698 |  |  |  | 2.26 |  |  | $ | 11.48 |  |  |  | 0 |  |  |  | 0.00 |  |  | $ | 0.00 |
$20-$25 |  |  | 11,185 |  |  |  | 5.43 |  |  | $ | 20.57 |  |  |  | 11,185 |  |  |  | 5.43 |  |  | $ | 20.57 |
$25-$30 |  |  | 50,978 |  |  |  | 8.09 |  |  | $ | 28.59 |  |  |  | 11,666 |  |  |  | 4.39 |  |  | $ | 27.09 |
$30-$35 |  |  | 1,380 |  |  |  | 8.62 |  |  | $ | 32.60 |  |  |  | 0 |  |  |  | 0.00 |  |  | $ | 0.00 |
|  |  | 1,055,014 |  |  |  |  |  |  |  |  |  |  |  | 185,330 |  |  |  |  |  |  |  |  |
Schedule of fair value of liability cash settled stock appreciation rights |
(in millions) |  | 2012 |  |  | 2011 |
Balance at January 1 |  | $ | 2.2 |  |  | $ | 0.8 |
Compensation charge |  |  | 5.2 |  |  |  | 0.4 |
Balance at September 30 |  | $ | 7.4 |  |  | $ | 1.2 |
Assumptions used in the Monte Carlo model |
|  | 2012 |  |  | 2011 |
Dividend yield |  |  | 0.0 | % |  |  | 0.2 | %
Volatility |  |  | 27.4 | % |  |  | 48.2 | %
Risk free interest rate |  |  | 0.34 | % |  |  | 0.43 | %

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -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 123R -Paragraph A240 -Subparagraph f -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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