Earnings Per Share - Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended	6 Months Ended
Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Numerator
Net earnings			$ 58,471	$ 24,975	$ 60,310	$ 26,612
Net earnings allocated to participating securities (restricted stock and deferred stock units) - basic				(31)		(31)
Net earnings allocated to participating securities (restricted stock and deferred stock units) - diluted		$ (31)				(31)
Net earnings (loss) allocated to common shareholders - basic			$ 58,471	$ 24,944	60,310	26,581
Net earnings (loss) allocated to common shareholders - diluted	$ 58,471	$ 24,944			$ 60,310	$ 26,581
Denominator
Basic weighted-average common shares outstanding (in shares)			49,107	48,609	48,958	48,527
Dilutive effect of share-based awards (in shares)			65	30	204	103
Diluted weighted-average common shares outstanding (in shares)			49,172	48,639	49,162	48,630
Net earnings (loss) per common share allocated to common shareholders:
Basic (in dollars per share)			$ 1.19	$ 0.51	$ 1.23	$ 0.55
Diluted (in dollars per share)			$ 1.19	$ 0.51	$ 1.23	$ 0.55

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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