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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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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.

+ References

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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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.

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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

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

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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).

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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-Topic 718

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- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

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Stock-Based Compensation (Details Textual) (USD $)	3 Months Ended		9 Months Ended
Stock-Based Compensation (Details Textual) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Stock-Based Compensation (Textual) [Abstract]
Stock options contractual terms			10 year
Stock-Based Compensation (Additional Textual) [Abstract]
Maximum number of shares available for Stock Incentive Plan	2,000,000		2,000,000
Shares available for grant	3,500,000		3,500,000
Stock-based compensation expense	$ 1,900,000	$ 2,405,000	$ 6,710,000	$ 5,980,000
Stock options intrinsic value			5,200,000	10,200,000
Weighted-average remaining contractual life, options outstanding			5 years 9 months 26 days
Weighted-average remaining contractual life, options exercisable			5 years 1 month 2 days
Stock Options [Member]
Stock-Based Compensation (Textual) [Abstract]
Stock options contractual terms			Ten-year
Unrecognized compensation cost	2,500,000		2,500,000
Weighted-average period in years, unrecognized compensation cost			1 year 10 months 24 days
Performance-Based Awards [Member]
Stock-Based Compensation (Textual) [Abstract]
Unrecognized compensation cost	10,300,000		10,300,000
Non-vested shares expected to vest	16,437		16,437
Non-Performance Based Awards [Member]
Stock-Based Compensation (Textual) [Abstract]
Non-vested shares expected to vest	740,773		740,773
weighted- average remaining expense period for non-vested shares			2 years 2 months 12 days
Restricted stock [Member]
Stock-Based Compensation (Textual) [Abstract]
Fair value of restricted stock units and restricted stock awards vested			$ 5,800,000	$ 6,000,000
Minimum [Member] \| Stock Options [Member]
Stock-Based Compensation (Textual) [Abstract]
Vested period			3 years
Minimum [Member] \| Performance-Based Awards [Member]
Stock-Based Compensation (Textual) [Abstract]
Vested period			1 year
Minimum [Member] \| Non-Performance Based Awards [Member]
Stock-Based Compensation (Textual) [Abstract]
Vested period			1 year
Maximum [Member] \| Stock Options [Member]
Stock-Based Compensation (Textual) [Abstract]
Vested period			5 years
Maximum [Member] \| Performance-Based Awards [Member]
Stock-Based Compensation (Textual) [Abstract]
Vested period			1 year
Maximum [Member] \| Non-Performance Based Awards [Member]
Stock-Based Compensation (Textual) [Abstract]
Vested period			3 years