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Share Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2011
Share Based Compensation [Abstract] |
Summary of Stock Incentive Plan, Non-Employee Directors Stock Option Plan | A summary of activity under our Stock Incentive Plan and the Non-Employee Directors Stock Option Plan during the year ended December 31, 2011 is presented below:
Options |  | Number |  |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (years) | Aggregate Intrinsic Value
Outstanding at January 1, 2011 |  |  | 675,575 |  |  | $ | 24.02 |  |  |
Granted |  |  | - |  |  |  | - |  |  |
Exercised |  |  | (12,677 | ) |  |  | 6.55 |  |  |
Forfeited/expired |  |  | (30,564 | ) |  |  | 21.07 |  |  |
Outstanding, fully vested and exercisable at December 31, 2011 (1) |  |  | 632,334 |  |  | $ | 24.51 |  | 5.77 | $541
(1) | As explained above, all unvested stock options immediately vested and became immediately exercisable. All such options will remain exercisable for their respective remaining term, regardless of whether the awardees remain employees of Century.
Service-based share awards (1) |  |  |
Outstanding at January 1, 2011 |  |  | 551,382 |
Granted |  |  | 221,758 |
Vested (Awarded) |  |  | (416,719 | )
Forfeited |  |  | (9,230 | )
Outstanding at December 31, 2011 |  |  | 347,191 |
(1) | All of our service-based stock awards granted prior to June 7, 2011 vested as explained above. Awards will settle upon original vesting date or payment schedule for the respective awards.
Non-vested stock options: |  | Number |  |  | Weighted Average Fair Value |
Non-vested options at January 1, 2011 |  |  | 303,141 |  |  | $ | 4.92 |
Granted |  |  | - |  |  |  | - |
Vested |  |  | (285,077 | ) |  |  | 4.92 |
Forfeited |  |  | (18,064 | ) |  |  | 4.94 |
Non-vested options at December 31, 2011 |  |  | - |  |  | $ | - |
|  | Year ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Weighted average per share fair value of: |  |  |  |  |  |  |  |  |
Stock options grants |  | $ | - |  |  | $ | - |  |  | $ | 4.92 |
Service-based share grants |  |  | 15.49 |  |  |  | 12.31 |  |  |  | 6.41 |
Total intrinsic value of option exercises |  |  | 72 |  |  |  | 1 |  |  |  | - |
Share-based liabilities paid (1) |  |  | - |  |  |  | 1,050 |  |  |  | 694 |
Total fair value of stock options vested during the period |  |  | 1,403 |  |  |  | 112 |  |  |  | 1,369 |
(1) | Share based liabilities paid represent the fair value of shares issued on the vesting date to certain key employees under our performance share program.
Assumptions to estimate the fair value of share awards | We used the following assumptions to estimate the fair value of our share awards for 2011, 2010 and 2009.
|  | 2011 |  |  | 2010 |  |  | 2009 |
Risk-free interest rate |  |  | 0.10% – 1.11 | % |  |  | 0.31% – 1.52 | % |  |  | 1.36% – 2.36 | %
Expected dividend yield |  | $ | 0.00 |  |  | $ | 0.00 |  |  | $ | 0.00 |
Expected volatility |  |  | 50% – 134 | % |  |  | 107% – 108 | % |  |  | 102% – 126 | %
Expected forfeiture rate |  |  | 0% – 3 | % |  |  | 0% – 3 | % |  |  | 0% – 3 | %
Expected term (years) |  |  | 1.0 – 3.0 |  |  |  | 1.0 – 3.0 |  |  |  | 3.0 – 5.0 |
Share based compensation cost | No share-based compensation cost was capitalized during these periods and there were no significant modifications (other than the accelerated vesting described above) of any share-based awards in 2011, 2010 and 2009.
|  | Year ended December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Share-based compensation expense reported: |  |  |  |  |  |  |  |  |
Performance-based stock expense |  | $ | 5,549 |  |  | $ | 5,586 |  |  | $ | 6,453 |
Service-based stock expense (1) |  |  | 692 |  |  |  | (1,668 | ) |  |  | 956 |
Stock option expense |  |  | 328 |  |  |  | 669 |  |  |  | 1,180 |
Total share-based compensation expense before income tax |  |  | 6,569 |  |  |  | 4,587 |  |  |  | 8,589 |
Income tax benefit |  |  | - |  |  |  | - |  |  |  | - |
Total share-based compensation expense, net of income tax benefit |  | $ | 6,569 |  |  | $ | 4,587 |  |  | $ | 8,589 |
(1) | We recorded a net credit for service-based stock awards in 2010 due to adjustments to share-based expense for payroll taxes paid in cash during the year.

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -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 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: 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 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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