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Debt (Details) (USD $) |  |  |  | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 01, 2014 note | Feb. 02, 2013 | Feb. 01, 2014 Senior Notes [Member] | Feb. 01, 2014 Series A Unsecured Senior Notes [Member] | Feb. 01, 2014 Series B Unsecured Senior Notes [Member] | Feb. 01, 2014 Unsecured Revolving Credit Facility [Member] | Feb. 02, 2013 Unsecured Revolving Credit Facility [Member] | Feb. 01, 2014 Standby Letters of Credit [Member] | Feb. 02, 2013 Standby Letters of Credit [Member] | Feb. 01, 2014 Trade Letters Of Credit [Member] | Feb. 02, 2013 Trade Letters Of Credit [Member] | Feb. 01, 2014 New York City Office [Member] Standby Letters of Credit [Member] | Sep. 30, 2013 New York City Office [Member] Standby Letters of Credit [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of unsecured senior notes held | 2 |  |  |  |  |  |  |  |  |  |  |  |
Unsecured senior notes | $ 150,000,000 | $ 150,000,000 | $ 150,000,000 | $ 85,000,000 | $ 65,000,000 |  |  |  |  |  |  |  |
Unsecured senior notes due date |  |  |  | Dec. 01, 2018 | Dec. 01, 2021 |  |  |  |  |  |  |  |
Unsecured senior notes interest rate |  |  |  | 6.38% | 6.53% |  |  |  |  |  |  |  |
Unsecured senior notes estimated fair value | 182,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Borrowing capacity for revolving credit facility |  |  |  |  |  | 600,000,000 |  |  |  |  |  |  |
Revolving credit facility expiration date |  |  |  |  |  | Jun. 01, 2017 |  |  |  |  |  |  |
Sublimit for issuance of standby letters of credit |  |  |  |  |  | 300,000,000 |  |  |  |  |  |  |
Basis points margin over LIBOR |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Revolving credit facility borrowing amount |  |  |  |  |  |  | 0 |  |  |  |  |  |
Standby letter of credit, amount outstanding |  |  |  |  |  |  |  | 24,300,000 | 33,800,000 |  |  | 11,100,000 | 11,100,000
Collateral trust | 47,200,000 | 34,900,000 |  |  |  |  |  |  |  |  |  |  |
Trade Letters Of Credit Amount |  |  |  |  |  |  |  |  |  | $ 31,600,000 | $ 38,000,000 |  |

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