Stock-Based Compensation (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	11 Months Ended
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares outstanding at January 31, 2013	3,984,497
Shares granted	241,860
Shares exercised	(76,200)
Shares forfeited/expired	(68,092)
Shares outstanding at December 31, 2013	4,082,065
Options, exercisable (fully vested) at December 31, 2013	3,097,724
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Outstanding at January 31, 2013	$ 35.62
Weighted Average Exercise Price, Granted	$ 17.60
Weighted Average Exercise Price, Exercised	$ 15.14
Weighted Average Exercise Price, Forfeited/expired	$ 32.69
Weighted Average Exercise Price, Outstanding at December 31, 2013	$ 34.98
Weighted Average Exercise Price, Exercisable as of December 31, 2013	$ 40.83
Weighted Average Remaining Contractual Term, Outstanding at December 31, 2013	4 years 4 months 17 days
Weighted Average Remaining Contractual Term, Exercisable (fully vested) at December 31, 2013	3 years 3 months 10 days
Intrinsic Value, Outstanding at December 31, 2013	$ 6,086
Intrinsic Value, Exercisable (fully vested) at December 31, 2013	$ 3,599

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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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.

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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.

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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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For presentations that combine terminations, 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 or that expired.

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

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

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

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

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

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

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

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

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