Valuation and Qualifying Accounts and Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2012		Jan. 31, 2011		Jan. 31, 2010
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	$ 13,237		$ 16,877		$ 15,703
Additions Charged (Credited) to Expenses	5,869		1,511		3,534
Net Deductions (Recoveries)	(6,805)		(6,016)		(2,833)
Other	(99)	[1]	865	[1]	473	[1]
Balance at End of Fiscal Year	12,202		13,237		16,877
Inventory Obsolescence [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	26,409		26,801		26,561
Additions Charged (Credited) to Expenses	5,114		13,038		8,397
Net Deductions (Recoveries)	(7,640)		(13,487)		(8,120)
Other	55	[1]	57	[1]	(37)	[1]
Balance at End of Fiscal Year	23,938		26,409		26,801
Valuation Allowance on Income Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	319,679		319,789		285,658
Additions Charged (Credited) to Expenses	20,674		22,310		38,286
Net Deductions (Recoveries)	0		0		0
Other	226	[1]	(22,420)	[1]	(4,155)	[1]
Balance at End of Fiscal Year	340,579		319,679		319,789
Warranties [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	1,996	[2]	1,292	[2]	1,188	[2]
Additions Charged (Credited) to Expenses	771		957		220
Net Deductions (Recoveries)	(389)		(121)		(42)
Other	(363)	[1]	(132)	[1]	(74)	[1]
Balance at End of Fiscal Year	$ 2,015	[2]	$ 1,996	[2]	$ 1,292	[2]

[1] Primarily consists of (i) the allocation of tax from continuing operations to discontinued operations, additional paid-in capital and other comprehensive income, and (ii) translation adjustments.

[2] Included in “Accounts payable and accrued expenses” in the consolidated balance sheets.