The closing price for entity's stock on the NASDAQ market at end of period.

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- Definition

Represents the number of in-the-money stock options exercisable.

+ References

No definition available.

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Represents the number of in-the-money stock options outstanding.

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No definition available.

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The number of shares under options that were surrendered during the reporting period as a result of Stock Option Exchange Program.

+ References

No definition available.

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Surrendered in Stock Option Program, Weighted Average Exercise Price,

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No definition available.

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ 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 (c)(1)(iii)

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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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.

+ References

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- Definition

Weighted average price of options that were either forfeited or expired.

+ 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 (c)(1)(iv)(3)-(4)

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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-Publisher FASB

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- Definition

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

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option 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

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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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.

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As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

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Weighted average remaining contractual term for fully vested and expected to vest options that are 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

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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No definition available.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Equity Incentive Plans and Stock-Based Compensation (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 22, 2012
Options
Number of Shares
Outstanding, at the beginning of the period (in shares)	11,377,146	13,094,815	14,587,596
Options granted (in shares)	2,370,313	2,084,276	7,789,220
Options exercised (in shares)	(905,464)	(483,923)	(221,934)
Stock options forfeited (in shares)	(1,400,349)	(3,318,022)	(2,610,812)
Options surrendered in stock option exchange program			(6,449,255)
Outstanding, at the end of the period (in shares)	11,441,646	11,377,146	13,094,815
Vested or expected to vest at the end of the period (in shares)	10,867,966
Options exercisable at the end of the period (in shares)	6,306,425
Weighted Average Exercise Price
Outstanding at the beginning of the year (in dollars per shares)	$ 11.32	$ 12.79	$ 19.73
Options granted (in dollars per share)	$ 9.63	$ 6.09	$ 5.81
Options exercised (in dollars per share)	$ 6.93	$ 6.72	$ 4.44
Options forfeited (in dollars per share)	$ 16.13	$ 14.51	$ 10.91
Options surrendered in stock option exchange program ( in dollars per share)			$ 21.11
Outstanding at the end of the period (in dollars per shares)	$ 10.73	$ 11.32	$ 12.79
Vested or expected to vest at the end of the period (in dollars per share)	$ 10.86
Options exercisable at the end of the period (in dollars per share)	$ 13.41
Weighted Average Remaining Contractual Term (in years)
Outstanding (in years)	5 years 10 months 24 days
Vested or expected to vest (in years)	5 years 9 months 4 days
Options exercisable (in years)	4 years 1 month 10 days
Aggregate Intrinsic Value
Outstanding	$ 35,073
Vested or expected to vest	33,266
Options exercisable	$ 14,970
Closing stock price (in dollars per share)	$ 11.09
Total number of in-the-money outstanding (in shares)	7,824,175
Total number of in-the-money exercisable (in shares)	3,351,309
Stock Option Exchange Program \| Options
Number of Shares
Options granted (in shares)			2,840,986
Options surrendered in stock option exchange program			(6,449,255)
Weighted Average Exercise Price
Options granted (in dollars per share)				$ 5.63
Stock Options with Market Condition
Number of Shares
Options granted (in shares)			1,795,000
Outstanding, at the end of the period (in shares)	1,315,000	1,315,000