Fair Value Measurements - Details of Impairment of Long-Lived Assets (Details) $ in Thousands	3 Months Ended
	Apr. 30, 2016 USD ($) store
Fair Value Disclosures [Abstract]
Carrying value of assets with impairment | $	$ 856
Fair value of assets impaired | $	$ 174
Number of stores tested for impairment | store	8
Number of stores with impairment | store	3