Option Exercise Price as Percentage of Fair Value of Common Stock

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- Definition

Share based Compensation Arrangement by Share based Payment Award, Calculation of Number of Stock Options and Shares of Restricted Stock to be Granted, Numerator

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- Definition

Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Nonvested, Total Intrinsic Value

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments, Other Than Options, Performance Period

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Exercisable Price Percentage Of Closing Price Of Another Class Of Stock

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- Definition

Share based Compensation Arrangement by Share based Payment Award, Maximum Fair Value that Can be Granted to A Participant in Any Fiscal Year

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares that Can be Granted to A Participant in Any Fiscal Year

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Maximum Value of Shares Per Employee

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Options, Expiration Term

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No definition available.

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award Percentage of Shares Authorized for Grant

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No definition available.

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Shares Remaining Available For Issuance

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No definition available.

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- Definition

Share Based Compensation Arrangements By Share Based Payment Award Number Of Years Of Service For Eligibility

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- Definition

Stock Plans, Vesting Percentage After First Year of Service

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- Definition

Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-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.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(ii)

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- Definition

Description of the period of time over 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, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

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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.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(2)

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- Definition

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

+ References

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

The range of expected volatilities used and the weighted-average expected volatility for an entity using a valuation technique with different volatilities during the contractual term.

+ References

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-Publisher FASB

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-Number 123R

-Paragraph A240

-Subparagraph e(2)(b)

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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-Paragraph A240

-Subparagraph c(2)

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- Definition

Net number of share options (or share units) granted during the period.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(d)

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

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-Name Accounting Standards Codification

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- Definition

The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph d(2)

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STOCK-BASED COMPENSATION PLANS - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011 Year	Dec. 31, 2010 Year	Dec. 31, 2009 Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, capitalized	$ 516,000	$ 178,000	$ 24,000
Weighted average assumptions used for estimating the fair value of the option grants, expected term (in years)	4.2	4.2	4.3
Weighted average assumptions used for estimating the fair value of the option grants, historical volatilities	78.00%	80.00%	82.00%
Weighted average assumptions used for estimating the fair value of the option grants, risk free interest rates	1.60%	1.90%	1.80%
Weighted average estimated fair value per share of stock options at grant date	$ 4.02	$ 3.07	$ 1.65
Stock option exercised, total intrinsic value	900,000	1,200,000	100,000
Restricted stock vested, total fair value	2,500,000	1,700,000	1,100,000
Unvested restricted stock, total intrinsic value	6,900,000
Calculation of number of stock options and shares of restricted stock to be granted, denominator	55,000
Calculation of number of stock options and shares of restricted stock to be granted, numerator	3
Stock option exercise price percentage	100.00%
Stock options outstanding	200,000
Common stock grants in period	1,683,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, capitalized		200,000	200,000
2005 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance	5,000,000
Maximum fair value that can be granted to any employee or director in any calendar year	3,000,000
2005 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares that may be granted as full value awards to total number of shares available for issuance	50.00%
2005 Plan \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that can be granted to any employee or director in any calendar year	1,400,000
2005 Plan \| Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that can be granted to any employee or director in any calendar year	1,400,000
2005 Plan \| Non-Forfeitable Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that can be granted to any employee or director in any calendar year	700,000
2005 Plan \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Value of equity compensation per each non-employee directors	75,000	37,500
2005 Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of equity compensation per each non-employee directors		37,500
2005 Plan \| Time Based Stock Option and Stock Appreciation Rights \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
2005 Plan \| Time Based Stock Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
2005 Plan \| Performance Based Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based awards, performance measurement period	1 year
Award vesting period	3 years
Director Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, maximum term	10 years
Stock options, first year vesting percentage	25.00%
Stock grant or stock unit grant, minimum service period (in years)	3
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock purchase price as a percentage of closing sale price	95.00%
Cash Received from participation	$ 100,000	$ 100,000	$ 100,000
Employee Stock Purchase Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock grants in period	100,000	100,000	100,000