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Common Stock and Stockholders' Equity - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | 0 Months Ended | |||||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2013
Performance Units [Member]
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Dec. 31, 2012
Performance Units [Member]
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Dec. 31, 2011
Performance Units [Member]
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Dec. 31, 2013
Nonvested RSUs [Member]
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Sep. 17, 2012
Chief Executive Officer [Member]
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Sep. 17, 2012
Chief Financial Officer [Member]
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Dec. 31, 2013
2010 Long-Term Incentive Plan [Member]
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Dec. 31, 2013
2010 Long-Term Incentive Plan [Member]
Common Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||
| Common stock granted | 11,000,000 | ||||||||||
| Share-based awards vesting period | 3 years | ||||||||||
| Restricted stock units, granted (in shares) | 349,651 | 261,438 | |||||||||
| Restricted shares to selected key personnel | 1,558,347 | ||||||||||
| Compensation expense related to the performance units | $ 9.4 | $ 7.2 | $ 5.9 | $ 1.8 | $ 0.5 | $ 2.1 | |||||
| Total fair value of the shares vested | 7.4 | 5.2 | 6.9 | ||||||||
| Weighted-average grant-date fair value of shares granted (in usd per share) | $ 4.77 | $ 5.37 | $ 5.61 | ||||||||
| Non-vested restricted stock awards and restricted stock units (in shares) | 2,812,482 | 3,408,355 | |||||||||
| Total unrecognized compensation cost of unamortized non-vested stock awards | $ 8.4 | ||||||||||
| Weighted-average vesting period | 20 months 24 days | ||||||||||
| Performance units under 2010 Long Term Incentive Plan (in shares) | 2,602,973 | 18,000 | 38,429 | ||||||||
| Performance units forfeited (in shares) | 370,727 | 13,358 | 3,955 | ||||||||
| Nominal value | $ 100.00 | ||||||||||
| Performance at the maximum level | 3 years | ||||||||||
| Performance period - awards percentage | 200.00% | ||||||||||
| Stock option outstanding or exercisable (in shares) | 0 | 0 | 5,130,182 | ||||||||
| Treasury stock shares (in shares) | 668,897 | 1,709,963 | |||||||||
| X | ||||||||||
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- Definition
Measurement Performance Period No definition available.
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| X | ||||||||||
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- Definition
The percentage of number of shares earned if maximum performance level is achieved. No definition available.
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| X | ||||||||||
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- Definition
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Nominal Value Per Share No definition available.
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| X | ||||||||||
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest. No definition available.
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| X | ||||||||||
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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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). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
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- Definition
The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. No definition available.
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| X | ||||||||||
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- Definition
Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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