Fair Value Measurement - Securities Carried at Amortized Cost Plus Accrued Interest (Details) - USD ($)
$ in Thousands |
Oct. 29, 2016 |
Jan. 30, 2016 |
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
$ 63,315
|
$ 63,561
|
| Total Fair Market Value |
63,348
|
63,591
|
| Short-term Investments |
|
|
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
34,132
|
32,671
|
| Gross Unrealized Gains |
6
|
5
|
| Gross Unrealized Losses |
(3)
|
(1)
|
| Total Fair Market Value |
34,135
|
32,675
|
| Short-term Investments | Obligations of the U.S. Treasury | Fair Value, Inputs, Level 1 |
|
|
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
9,992
|
8,763
|
| Gross Unrealized Gains |
6
|
3
|
| Gross Unrealized Losses |
|
(1)
|
| Total Fair Market Value |
9,998
|
8,765
|
| Short-term Investments | Obligations of states and municipalities | Fair Value, Inputs, Level 2 |
|
|
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
13,596
|
2,930
|
| Gross Unrealized Gains |
|
2
|
| Gross Unrealized Losses |
(3)
|
|
| Total Fair Market Value |
13,593
|
2,932
|
| Short-term Investments | Bank certificates of deposit | Fair Value, Inputs, Level 2 |
|
|
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
10,544
|
20,978
|
| Total Fair Market Value |
10,544
|
20,978
|
| Long Term Investments |
|
|
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
29,183
|
30,890
|
| Gross Unrealized Gains |
30
|
33
|
| Gross Unrealized Losses |
|
(7)
|
| Total Fair Market Value |
29,213
|
30,916
|
| Long Term Investments | Obligations of the U.S. Treasury | Fair Value, Inputs, Level 1 |
|
|
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
15,012
|
20,002
|
| Gross Unrealized Gains |
30
|
33
|
| Gross Unrealized Losses |
|
(7)
|
| Total Fair Market Value |
15,042
|
20,028
|
| Long Term Investments | Bank certificates of deposit | Fair Value, Inputs, Level 2 |
|
|
| Investment securities classified as held to maturity |
|
|
| Amortized Cost |
14,171
|
10,888
|
| Total Fair Market Value |
$ 14,171
|
$ 10,888
|