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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The following table sets out the weighted average assumptions used to estimate the fair value of the options and SSARs granted using the Black-Scholes option-pricing model in the first three months of the respective years noted:
| 2012 |  | 2011
Expected stock price volatility | 63.3% |  | 64.2%
Expected dividend yield | —% |  | —%
Risk-free interest rate | 0.7% |  | 2.1%
Expected life of options | 5 years |  | 5 years
Weighted average fair value of options and SSARs granted | $4.68 |  | $5.68
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | The following table summarizes stock options and SSARs outstanding as of March 31, 2012, as well as activity during the three month period then ended.
Share amounts in thousands | Options and SSARs |  | Weighted Average Exercise Price |  | Weighted Average Contractual Term (in years) |  | Aggregate Intrinsic Value (in millions)
Options / SSARs outstanding at January 1, 2012 | 8,315 |  |  | $ | 12.78 |  |  |  |  |
SSARs granted | 822 |  |  | 8.84 |  |  |  |  |
Options / SSARs exercised | (80 | ) |  | 6.97 |  |  |  |  |
Options /SSARs cancelled | (16 | ) |  | 14.45 |  |  |  |  |
Options/SSARs outstanding at March 31, 2012 | 9,041 |  |  | $ | 12.47 |  |  | 6.4 |  |  | $ | 16.2 |
Vested and expected to vest at March 31, 2012 | 8,589 |  |  | — |  |  | — |  |  | $ | 15.4 |
Options/SSARS exercisable at March 31, 2012 | 7,276 |  |  | $ | 13.36 |  |  | — |  |  | $ | 14.8 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | The following table summarizes incentive share awards outstanding as of March 31, 2012 as well as activity during the three months then ended.
| Shares |  | Weighted Average Contractual Term (in years) |  | Aggregate Intrinsic Value (in millions)
Incentive share awards outstanding at January 1, 2012 | 1,112,868 |  |  |  |  |
Incentive share awards granted | 314,552 |  |  |  |  |
Incentive share awards vested | (407,909 | ) |  |  |  |
Incentive share awards canceled | (19,362 | ) |  |  |  |
Incentive shares outstanding at March 31, 2012 | 1,000,149 |  |  | 1.82 |  |  | $ | 9.4 |
Vested and expected to vest at March 31, 2012 | 950,142 |  |  |  |  |  | $ | 8.9 |
Incentive share awards exercisable at March 31, 2012 | — |  |  | — |  |  | — |
Restricted Stock Activity [Table Text Block] | The following table summarizes the restricted stock outstanding as of March 31, 2012 as well as activity during the three months then ended.
| Number of Shares |  | Weighted Average Grant Date Fair Value
Restricted stock awards outstanding at January 1, 2012 | 760,728 |  |  | $ | 5.04 |
Restricted stock awards granted | 177,196 |  |  | 8.84 |
Restrictions lapsed | (405,750 | ) |  | 2.17 |
Restricted stock awards at March 31, 2012 | 532,174 |  |  | $ | 8.49 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -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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