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Acquisitions (Pro Forma Operating Results) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2011
Acquisitions [Abstract]
Revenues and other income	$ 1,936,880
Net income attributable to Leucadia National Corporation common shareholders	$ 36,202
Basic earnings per common share attributable to Leucadia National Corporation common shareholders	$ 0.15
Diluted earnings per common share attributable to Leucadia National Corporation common shareholders	$ 0.15

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details