Supplemental Cash Flow Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Schedule of Cash Flow, Supplemental [Line Items]
Interest Paid, Net	$ 11,981	$ 14,686	$ 13,701
Income Taxes Paid, Net	10,777	8,707	10,627
Frontline Member
Schedule of Cash Flow, Supplemental [Line Items]
Returns received on investment	$ 6,250	$ 7,015	$ 4,700

This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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