Notes Redemption Prices (Expressed as Percentages of Principal Amount) (Detail)	12 Months Ended
May 31, 2012
Long-Term Debt [Abstract]
2015	104.625%
2016	103.083%
2017	101.542%
2018 and thereafter	100.00%

Percentage of principal amount of senior notes, outstanding, that can be redeemed, in year four and thereafter.

No definition available.

Name:	txi_PercentageOfPrincipalAmountOfSeniorNotesOutstandingThatCanBeRedeemedInYearFourAndThereafter
Namespace Prefix:	txi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration