XML 44 R65.htm IDEA: XBRL DOCUMENT

Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Disclosure Income Taxes Additional Information [Abstract]
Effective Tax Rate	3.00%	(35.00%)
Period specific items benefit	$ (1,327)	$ (1,334)
Forecasted tax rate	7.00%
EffectiveIncome Tax Rate Forecast	7.00%
U.S. federal statutory rate	35.00%
Income taxes associated with uncertain income tax positions	$ 32,532

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.

+ References+ Details

- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

+ References+ Details