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Line of Credit (Line of Credit) (Details) - Renewed Credit Facility
6 Months Ended
Aug. 03, 2019
USD ($)
Debt Instrument [Line Items]  
Revolving credit facility maximum borrowings $ 20,000,000.0
Revolving credit facility collateral amount 100,000,000.0
Increase in revolving credit facility 50,000,000.0
Issuance of letters of credit $ 20,000,000.0
Debt instrument, interest rate, increase (decrease) 2.00%
Line of credit facility, current borrowing capacity $ 0
LIBOR Plus  
Debt Instrument [Line Items]  
Interest rate on borrowings (percent) 1.00%