Leased Facilities and Commitments - Schedule of Future Minimum Rent Commitments (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Operating Leased Assets [Line Items]  
Initial lease term 10 years
2015 $ 222,562
2016 176,521
2017 161,606
2018 148,011
2019 132,948
Thereafter 566,285
Total $ 1,407,933
Minimum [Member]  
Operating Leased Assets [Line Items]  
Remaining lease term, operating leases 1 year
Maximum [Member]  
Operating Leased Assets [Line Items]  
Remaining lease term, operating leases 15 years