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Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Shares	Additional Paid-in Capital	Retained Earnings	Accumulated other Comprehensive Loss
Beginning Balances at Jan. 31, 2010	$ 1,296,775	$ 17	$ 184,620	$ 1,121,232	$ (9,094)
Beginning Balances (in shares) at Jan. 31, 2010		168,558,371
Comprehensive income	271,790			272,958	(1,168)
Share-based compensation	10,725		10,725
Stock options and awards (in shares)		2,256,273
Stock options and awards	24,129		24,129
Excess tax benefit from share-based awards	12,847		12,847
Share repurchases (in shares)		(6,401,217)
Share repurchases	(204,718)		(204,718)
Ending Balances at Jan. 31, 2011	1,411,548	17	27,603	1,394,190	(10,262)
Ending Balances (in shares) at Jan. 31, 2011		164,413,427
Comprehensive income	184,001			185,251	(1,250)
Share-based compensation	3,068		3,068
Stock options and awards (in shares)		993,923
Stock options and awards	4,134		4,134
Excess tax benefit from share-based awards	8,995		8,995
Share repurchases (in shares)		(20,774,343)
Share repurchases	(545,478)	(2)	(43,800)	(501,676)
Ending Balances at Jan. 31, 2012	1,066,268	15		1,077,765	(11,512)
Ending Balances (in shares) at Jan. 31, 2012		144,633,007
Comprehensive income	240,044			237,314	2,730
Share-based compensation	10,892		10,892
Stock options and awards (in shares)		1,382,760
Stock options and awards	30,671		30,671
Excess tax benefit from share-based awards	6,713		6,713
Ending Balances at Jan. 31, 2013	$ 1,354,588	$ 15	$ 48,276	$ 1,315,079	$ (8,782)
Ending Balances (in shares) at Jan. 31, 2013		146,015,767

X

- Definition

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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Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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

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