Earnings Per Share Data ("EPS") and Stock Based Compensation (Details Textual) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value, per share			$ 10.72
Earnings Per Share Data ("EPS") and Stock Based Compensation (Textual) [Abstract]
Weighted-average stock options excluded from antidilutive securities	2,600,000	2,700,000	2,600,000	922,000
Unrecognized compensation cost related to unvested options and restricted stock	$ 40,000,000		$ 40,000,000
Unrecognized compensation cost, remaining weighted average vesting period in years			2 years 8 months 12 days
Stock options granted during period (net of cancellations)			2,794,250
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost recognized	4,800,000	4,300,000	14,400,000	12,000,000
Compensation cost recognized, after-tax	3,000,000	2,600,000	8,900,000	7,400,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost recognized	567,000	544,000	1,700,000	1,400,000
Compensation cost recognized, after-tax	$ 352,000	336,000	$ 1,100,000	894,000
Restricted stock shares granted			54,127
Weighted-average grant date fair value, per share			$ 36.95

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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.

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The amount of expense, net of income tax, 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.

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No definition available.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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.

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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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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).

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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).

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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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