Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2012		Jan. 31, 2011		Jan. 31, 2010
Operating Cash Flows:
Net income (loss)	$ 83,387		$ 28,584		$ (21,889)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization of property, plant, and equipment	31,948		30,814		31,120
Amortization of intangible assets and debt costs	22,239		26,129		28,538
Loss (gain) on debt extinguishment	3,518				(380)
Write-off of debt issuance costs	8,010		132		26
Stock-based compensation	21,658	[1]	20,511	[1]	26,159	[1]
Deferred income taxes	2,754		(3,541)		13,962
Changes in other long-term liabilities	2,889		(7,054)		(3,669)
Gain on conversion of equity method investment to controlling interest	(1,519)
In-process research and development			120
Write-down of long-term investments					113
Equity in (income) loss of unconsolidated entities, net of dividends received	4,874		3,587		995
(Gain) loss on disposal of property, plant, and equipment, net	(7)		(30)		208
Changes in operating assets and liabilities, net of effect of acquired businesses:
Trade accounts receivable, net	(8,915)		(44,735)		(1,117)
Prepaid expenses and other	(16,295)		(3,013)		20,056
Term receivables, long-term	(54,637)		(4,409)		(9,479)
Accounts payable and accrued liabilities	(3,122)		20,951		(957)
Income taxes payable	(11,725)		(1,424)		(28,225)
Deferred revenue	18,881		15,586		(17,572)
Net cash provided by operating activities	103,938		82,208		37,889
Investing Cash Flows:
Proceeds from sales and maturities of short-term investments			3		1,994
Increase in restricted cash	(3,977)
Purchases of property, plant, and equipment	(41,555)		(47,175)		(46,397)
Acquisitions of businesses and equity interests, net of cash acquired	(15,260)		(25,578)		(5,535)
Net cash used in investing activities	(60,792)		(72,750)		(49,938)
Financing Cash Flows:
Proceeds from issuance of common stock	37,460		27,530		20,059
Repurchase of common stock	(89,996)
Tax effect of share options exercised					(96)
Net increase (decrease) in short-term borrowings	(1,284)		(2,162)		973
Debt and equity issuance costs	(9,020)		(1,220)		(544)
Proceeds from notes payable and revolving credit facility	253,000		100,225		20,000
Repayments of notes payable and revolving credit facility	(219,919)		(102,263)		(23,450)
Net cash (used in) provided by financing activities	(29,759)		22,110		16,942
Effect of exchange rate changes on cash and cash equivalents	(1)		2,205		805
Net change in cash and cash equivalents	13,386		33,773		5,698
Cash and cash equivalents at the beginning of the period	133,113		99,340		93,642
Cash and cash equivalents at the end of the period	$ 146,499		$ 133,113		$ 99,340

[1] All of equity plan-related compensation expense for the years ended January 31, 2012 and 2011 relates to stock options, stock awards, and the ESPPs. Equity plan-related compensation expense for the year ended January 31, 2010 includes $25,657 relating to stock options, stock awards, and the ESPPs and $502 relating to the amortization of expense associated with stock issued to the founders of a company we acquired during the year ended January 31, 2008.