Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2015

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table summarizes the reconciliation of the numerators and denominators for the basic and diluted EPS computations:

	Years Ended January 31,
(in thousands)	2015		2014		2013
Net earnings for basic and diluted EPS	$	484,179	$	181,369	$	416,157
Weighted-average shares for basic EPS	129,221		127,835		126,737
Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units	697		1,032		1,197
Weighted-average shares for diluted EPS	129,918		128,867		127,934

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

At January 31, 2015 and 2014, goodwill, included in other assets, net, consisted of the following by segment:

(in thousands)	Americas			Asia-Pacific			Japan			Europe			Other			Total
January 31, 2013	$	12,368		$	280		$	1,103		$	1,108		$	24,905		$	39,764
Translation	(13		)	(2		)	(6		)	(2		)	(5		)	(28		)
January 31, 2014	12,355			278			1,097			1,106			24,900			39,736
Translation	(94		)	5			(33		)	(27		)	(751		)	(900		)
January 31, 2015	$	12,261		$	283		$	1,064		$	1,079		$	24,149		$	38,836

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Finite-Lived Intangible Assets

The following table summarizes intangible assets and key money, included in other assets, net, as follows:

	January 31, 2015					January 31, 2014
(in thousands)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Product rights	$	59,409	$	(16,186	)	$	59,409	$	(9,405	)
Key money deposits	33,740		(2,443		)	39,588		(1,722		)
Trademarks	2,452		(2,452		)	2,452		(2,452		)
	$	95,601	$	(21,081	)	$	101,449	$	(13,579	)

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Depreciation is calculated on a straight-line basis over the following estimated useful lives:

Buildings	39 years
Machinery and Equipment	5-15 years
Office Equipment	3-8 years
Furniture and Fixtures	2-10 years

	January 31,
(in thousands)	2015			2014
Land	$	42,666		$	42,710
Buildings	125,846			118,622
Leasehold and building improvements	1,036,422			990,488
Office equipment	586,225			517,622
Furniture and fixtures	261,076			246,751
Machinery and equipment	155,184			141,880
Construction-in-progress	59,771			40,569
	2,267,190			2,098,642
Accumulated depreciation and amortization	(1,367,683		)	(1,243,547		)
	$	899,507		$	855,095