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Condensed Consolidated Statement of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Jan. 31, 2015					$ (15,427)
Comprehensive income	$ 105,052
Share repurchases (in shares)	(7,037,141)
Share repurchases	$ (253,618)
Ending Balance at Jul. 31, 2015	$ 1,231,248				(9,992)
Ending Balances (in shares) at Jul. 31, 2015	125,126,008
Beginning Balance at Apr. 30, 2015					(12,320)
Comprehensive income	$ 69,169
Share repurchases (in shares)	(6,635,164)
Share repurchases	$ (236,312)
Ending Balance at Jul. 31, 2015	$ 1,231,248				(9,992)
Ending Balances (in shares) at Jul. 31, 2015	125,126,008
Beginning Balance at Jan. 31, 2016	$ 1,137,227	$ 12		$ 1,160,666	(23,451)
Beginning Balances (in shares) at Jan. 31, 2016	117,321,120	117,321,120
Comprehensive income	$ 103,001			106,477	(3,476)
Share-based compensation	12,752		$ 12,752
Stock options and awards (in shares)		140,100
Stock options and awards	2,901		2,901
Excess tax benefit from share-based awards	$ (159)		(159)
Share repurchases (in shares)	(324,700)	(324,700)
Share repurchases	$ (10,704)		(8,382)	(2,322)
Ending Balance at Jul. 31, 2016	$ 1,245,018	$ 12	7,112	1,264,821	(26,927)
Ending Balances (in shares) at Jul. 31, 2016	117,136,520	117,136,520
Beginning Balance at Apr. 30, 2016					(13,865)
Comprehensive income	$ 63,853
Ending Balance at Jul. 31, 2016	$ 1,245,018	$ 12	$ 7,112	$ 1,264,821	$ (26,927)
Ending Balances (in shares) at Jul. 31, 2016	117,136,520	117,136,520

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This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Number of share options (or share units) exercised during the current period.

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Value of stock issued as a result of the exercise of stock options.

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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