Fair Value Measurements - Underlying Asset Value (Details) - USD ($) $ in Thousands	Jul. 29, 2017	Jan. 28, 2017	Jul. 30, 2016
Investment [Line Items]
Underlying assets in non-qualified deferred compensation program	$ 114,711	$ 100,423	$ 99,968
Level 1
Investment [Line Items]
Underlying assets in non-qualified deferred compensation program	97,282	84,933	83,651
Level 2
Investment [Line Items]
Underlying assets in non-qualified deferred compensation program	$ 17,429	$ 15,490	$ 16,317