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Schedule of Estimated Effective Income Tax Rate (Detail)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Income Taxes
Continuing operations	145.50%	27.30%
Discontinued operations	21.20%	30.00%
Consolidated overall	110.60%	26.90%

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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