Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 29, 2017 |
Apr. 30, 2016 |
|
| Statement of Comprehensive Income [Abstract] | ||
| Net earnings | $ 321,018 | $ 290,634 |
| Other comprehensive (loss) income: | ||
| Change in unrealized loss on investments, net of tax | (16) | (12) |
| Comprehensive income | $ 321,002 | $ 290,622 |