Debt (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended
	Apr. 16, 2020	May 02, 2020
Debt Instrument [Line Items]
Line of credit facility, expiration date	Mar. 27, 2022
Credit facility interest rate description		(1) the agent bank’s prime rate as defined in the Credit Agreement plus 1.0%, with the prime rate defined as the greater of (a) the Federal Fund rate plus 0.50% or (b) the interest rate announced from time to time by the agent bank as its “prime rate” or (2) LIBOR plus 1.50% to 2.50%, depending on our achievement of certain performance criteria.
Maximum amount outstanding during period		$ 8.7
Outstanding letters of credit		1.2
Line of credit, available borrowing amount		$ 94.9
Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility, exercised	$ 50.0
Maximum [Member]
Debt Instrument [Line Items]
Commitment fee percentage rate		0.30%
Maximum [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility, revolving commitment	100.0
Line of credit swing line sublimit	$ 15.0
Rent expenses	3.00%
Minimum [Member]
Debt Instrument [Line Items]
Commitment fee percentage rate		0.40%
Minimum [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility, revolving commitment	$ 50.0
Line of credit swing line sublimit	$ 10.0
Rent expenses	2.50%