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Stock-Based Compensation - Schedule of Transactions for Restricted Stock Units Under Plan (Details) - Stock Award Units - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Number of Stock Award Units
Stock Award Units, Beginning Balance	342,770	381,158	374,598
Units granted	228,310	133,245	187,777
Units vested	(112,170)	(115,574)	(170,010)
Units forfeited	(11,888)	(56,059)	(11,207)
Stock Award Units, Ending Balance	447,022	342,770	381,158
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning Balance	$ 26.07	$ 31.71	$ 33.83
Units granted, Weighted Average Grant Date Fair Value	39.22	23.31	27.76
Units vested, Weighted Average Grant Date Fair Value	27.60	39.44	31.85
Units forfeited, Weighted Average Grant Date Fair Value	30.82	30.27	34.50
Weighted Average Grant Date Fair Value Ending Balance	$ 32.27	$ 26.07	$ 31.71
Weighted-Average Remaining Contractual Term (years)
Units outstanding, Weighted-Average Remaining Contractual Term (years)	1 year 4 months 24 days
Aggregate Intrinsic Value
Units outstanding, Aggregate Intrinsic Value	$ 14,282

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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