Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Earnings Per Share [Abstract]
Net income - basic earnings per share	$ 21,582	$ 17,175
Interest expense on convertible debt	5	5
Net income after assumed conversion - diluted earnings per share	$ 21,587	$ 17,180
Basic weighted average common shares outstanding	138,898,581	120,193,233
Net effect of dilutive stock options, warrants, restricted stock and convertible debt	1,488,044	759,740
Diluted weighted average common shares outstanding	140,386,625	120,952,973
Basic earnings per share	$ 0.16	$ 0.14
Diluted earnings per share	$ 0.15	$ 0.14
Common stock excluded from computation of diluted earnings per share	120,627	377,153

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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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The after-tax amount of interest recognized in the period associated with any convertible debt.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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