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Significant Components of Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2013
Jan. 31, 2012
Components Of Deferred Tax Assets And Liabilities [Line Items]    
Prepaid expenses $ (2,794) $ (1,402)
Depreciation (56,434) (4,761)
Gross deferred tax liabilities (59,228) (6,163)
Deferred rent 64,539 37,024
Inventories 3,357 3,093
Accounts receivable 2,093 1,166
Net operating loss carryforwards 4,356 5,684
Tax uncertainties 5,710 7,651
Accrued salaries and benefits 20,390 13,786
Other temporary differences 1,986 4,437
Gross deferred tax assets, before valuation allowances 102,431 72,841
Valuation allowances (2,083) (2,754)
Net deferred tax assets $ 41,120 $ 63,924