Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Feb. 02, 2013	Jan. 28, 2012
Investment securities classified as held to maturity
Amortized Cost	$ 18,525	$ 19,742
Total Fair Market Value	18,579	19,838
Short-term:
Investment securities classified as held to maturity
Amortized Cost	12,771
Gross Unrealized Gains	48
Total Fair Market Value	12,819
Short-term: | Bank certificates of deposit | Level 2
Investment securities classified as held to maturity
Amortized Cost	6,047	902
Gross Unrealized Gains		1
Total Fair Market Value	6,047	903
Short-term: | Obligations of the U.S. Treasury | Level 1
Investment securities classified as held to maturity
Amortized Cost	4,993
Gross Unrealized Gains	39
Total Fair Market Value	5,032
Short-term: | Obligations of states and municipalities | Level 2
Investment securities classified as held to maturity
Amortized Cost	1,731
Gross Unrealized Gains	9
Total Fair Market Value	1,740
Long-term:
Investment securities classified as held to maturity
Amortized Cost		18,840
Gross Unrealized Gains		96
Gross Unrealized Losses		1
Total Fair Market Value		18,935
Long-term: | Bank certificates of deposit | Level 2
Investment securities classified as held to maturity
Amortized Cost	5,754	12,045
Gross Unrealized Gains	6
Gross Unrealized Losses		1
Total Fair Market Value	5,760	12,044
Long-term: | Obligations of the U.S. Treasury | Level 1
Investment securities classified as held to maturity
Amortized Cost		4,986
Gross Unrealized Gains		77
Total Fair Market Value		5,063
Long-term: | Obligations of states and municipalities | Level 2
Investment securities classified as held to maturity
Amortized Cost		1,809
Gross Unrealized Gains		19
Total Fair Market Value		$ 1,828