Fair Value Measurements (Financial Assets Valued On A Recurring Or Non-Recurring Basis, Based On The Priority Of The Inputs To The Valuation Technique) (Details) (USD $) | Aug. 02, 2014 | Feb. 01, 2014 | Aug. 03, 2013 |
In Thousands, unless otherwise specified |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Deferred compensation plan | $7,560 | $6,299 | $5,092 |
Total | 104,260 | 129,810 | 219,355 |
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Deferred compensation plan | 7,560 | 6,299 | 5,092 |
Total | 12,143 | 23,620 | 45,947 |
Significant Other Observable Inputs (Level 2) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Deferred compensation plan | 0 | 0 | 0 |
Total | 92,117 | 106,190 | 173,408 |
Significant Unobservable Inputs (Level 3) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Deferred compensation plan | 0 | 0 | 0 |
Total | 0 | 0 | 0 |
Corporate Bonds [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 50,861 | 45,651 | 76,497 |
Corporate Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 50,861 | 45,651 | 76,497 |
Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
Municipal Securities [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 25,736 | 51,519 | 91,903 |
Municipal Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
Municipal Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 25,736 | 51,519 | 91,903 |
Municipal Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
U.S. Government Securities [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 2,159 | 9,812 | 35,026 |
U.S. Government Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 2,159 | 9,812 | 35,026 |
U.S. Government Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
U.S. Government Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
U.S. Government Agencies [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 15,520 | 9,020 | 5,008 |
U.S. Government Agencies [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
U.S. Government Agencies [Member] | Significant Other Observable Inputs (Level 2) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 15,520 | 9,020 | 5,008 |
U.S. Government Agencies [Member] | Significant Unobservable Inputs (Level 3) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Marketable securities | 0 | 0 | 0 |
Money Market Accounts [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Cash equivalents | 2,424 | 7,509 | 5,829 |
Money Market Accounts [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Cash equivalents | 2,424 | 7,509 | 5,829 |
Money Market Accounts [Member] | Significant Other Observable Inputs (Level 2) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Cash equivalents | 0 | 0 | 0 |
Money Market Accounts [Member] | Significant Unobservable Inputs (Level 3) [Member] | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' |
Cash equivalents | $0 | $0 | $0 |