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Accrued Expenses - Components of Accrued Expenses (Details) - USD ($)
$ in Thousands
Oct. 31, 2015
Jan. 31, 2015
Payables And Accruals [Abstract]    
Book overdraft $ 20,871 $ 8,305
Unearned revenue 10,810 11,663
Accrued payroll and related expenses 8,641 7,104
Sales and use tax payable 4,973 3,708
Accrued construction costs 755 1,263
Litigation accrual   4,000
Other 8,107 6,577
Accrued expenses $ 54,157 $ 42,620