Fair Value Measurements - Financial Assets Valued on a Recurring Basis (Details) - USD ($) $ in Thousands	Apr. 29, 2017	Jan. 28, 2017	Apr. 30, 2016
Non Current Assets
Deferred compensation plan	$ 7,733	$ 7,523	$ 7,785
Total assets	58,737	58,364	58,399
Financial Liabilities
Long-term debt	79,801	84,785	89,735
Quoted Prices in Active Markets for Identical Assets (Level 1)
Non Current Assets
Deferred compensation plan	7,733	7,523	7,785
Total assets	8,108	7,994	7,920
Financial Liabilities
Long-term debt	0	0	0
Significant Other Observable Inputs (Level 2)
Non Current Assets
Deferred compensation plan	0	0	0
Total assets	50,629	50,370	50,479
Financial Liabilities
Long-term debt	80,120	85,139	90,156
Significant Unobservable Inputs (Level 3)
Non Current Assets
Deferred compensation plan	0	0	0
Total assets	0	0	0
Financial Liabilities
Long-term debt	0	0	0
Municipal securities
Current Assets
Marketable securities	6,774	5,634	1,535
Municipal securities \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities	0	0	0
Municipal securities \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities	6,774	5,634	1,535
Municipal securities \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities	0	0	0
U.S. government agencies
Current Assets
Marketable securities	20,024	23,071	19,823
U.S. government agencies \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities	0	0	0
U.S. government agencies \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities	20,024	23,071	19,823
U.S. government agencies \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities	0	0	0
Corporate bonds
Current Assets
Marketable securities	17,336	15,799	24,892
Corporate bonds \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities	0	0	0
Corporate bonds \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities	17,336	15,799	24,892
Corporate bonds \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities	0	0	0
Commercial paper
Current Assets
Marketable securities	6,495	5,866	4,229
Commercial paper \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Marketable securities	0	0	0
Commercial paper \| Significant Other Observable Inputs (Level 2)
Current Assets
Marketable securities	6,495	5,866	4,229
Commercial paper \| Significant Unobservable Inputs (Level 3)
Current Assets
Marketable securities	0	0	0
Money market accounts
Current Assets
Cash equivalents	375	471	135
Money market accounts \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Current Assets
Cash equivalents	375	471	135
Money market accounts \| Significant Other Observable Inputs (Level 2)
Current Assets
Cash equivalents	0	0	0
Money market accounts \| Significant Unobservable Inputs (Level 3)
Current Assets
Cash equivalents	$ 0	$ 0	$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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