Represents the number of non-transferable contingent cash payments right for each restricted stock awards vested.

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Represents the offer price per share on restricted stock awards vested as a result of the Transaction Agreement and change in control at the parent company.

+ References

No definition available.

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Represents the number of shares, right to receive cash payment equal to fair value of which is received per unit on vesting of award.

+ References

No definition available.

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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, shown as a percentage.

+ References

No definition available.

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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.

+ References

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-Publisher SEC

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

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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

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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.

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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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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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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).

+ References

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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).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

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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.

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-Publisher FASB

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan 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.

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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).

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph A240

-Subparagraph a

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-Name Accounting Standards Codification

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-Paragraph 2

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Share-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
Share-Based Compensation (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	May 31, 2012
Other disclosures
Liability for unvested restricted share awards	$ 53,800,000		$ 53,800,000		$ 51,200,000
Restricted stock units
Other disclosures
Vesting period			3 years
Vesting rights percentage			33.00%
Number of shares, right to receive cash payment equal to fair value of which is received per unit on vesting of award			1
Restricted stock units \| Mr. Lipinski
Non-vested shares activity
Granted (in shares)			62,920
Other disclosures
Compensation expense	0		0
Restricted stock units \| Certain executive officers
Other disclosures
Vesting period			1 year
Long-Term Incentive Plan
Share-Based Compensation
Common stock authorized for issuance (in shares)	7,500,000		7,500,000
Other disclosures
Number of non-transferable contingent cash payments right for each restricted stock awards vested in 2012 (in shares)						1
Long-Term Incentive Plan \| Stock Options
Share-Based Compensation
Common stock authorized for issuance (in shares)	1,000,000		1,000,000
Long-Term Incentive Plan \| Restricted stock units
Non-vested shares activity
Non-vested at the beginning of the period (in shares)			1,145,611
Granted (in shares)			2,600
Vested (in shares)			(184,952)
Forfeited (in shares)			(15,089)
Non-vested at the end of the period (in shares)	948,170		948,170
Weighted-Average Grant-Date Fair Value
Non-vested at the beginning of the period (in dollars per share)			$ 23.24
Granted (in dollars per share)			$ 54.75
Vested (in dollars per share)			$ 7.99
Forfeited (in dollars per share)			$ 22.76
Non-vested at the end of the period (in dollars per share)	$ 26.31		$ 26.31
Other disclosures
Offer price per share received as cash settlement on restricted stock awards vested in 2012						$ 30.00
Additional share-based compensation incurred on modification of awards				12,400,000
Vesting period			3 years
Unrecognized compensation cost	8,200,000		8,200,000
Weighted-average period for amortization of unrecognized compensation cost			8 months 12 days
Compensation expense	3,000,000	6,000,000	12,100,000	26,800,000
Liability for unvested restricted share awards	$ 26,100,000		$ 26,100,000		$ 19,500,000