Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Operating Cash Flows:
Net income	$ 138,634	$ 83,387	$ 28,584
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, plant, and equipment	33,305	31,948	30,814
Amortization of intangible assets and debt costs	20,246	22,239	26,129
Loss on debt extinguishment	0	3,518	0
Write-off of debt discount and debt issuance costs	0	8,010	132
Stock-based compensation	23,697	21,658	20,511
Deferred income taxes	(1,634)	2,754	(3,541)
Changes in other long-term liabilities	(6,143)	2,889	(7,054)
Gain (Loss) on Converstion of Equity Method Investment To Controlling Interest	0	(1,519)	0
In-process research and development	0	0	(120)
Dividends received from unconsolidated entities, net of equity in income	4,358	4,874	3,587
Loss (gain) on disposal of property, plant, and equipment, net	74	(7)	(30)
Changes in operating assets and liabilities, net of effect of acquired businesses:
Trade accounts receivable, net	(58,389)	(8,915)	(44,735)
Prepaid expenses and other	(21,861)	(16,295)	(3,013)
Term receivables, long-term	(30,980)	(54,637)	(4,409)
Accounts payable and accrued liabilities	(2,720)	(3,122)	20,951
Income taxes payable	(5,084)	(11,725)	(1,424)
Deferred revenue	45,784	18,881	15,586
Net cash provided by operating activities	139,287	103,938	82,208
Investing Cash Flows:
Proceeds from the sales and maturities of short-term investments	0	0	3
Increase (Decrease) in Restricted Cash	0	3,977	0
Purchases of property, plant, and equipment	(45,130)	(41,555)	(47,175)
Acquisitions of businesses and equity interests and other intangible assets, net of cash acquired	(15,652)	(15,260)	(25,578)
Net cash used in investing activities	(60,782)	(60,792)	(72,750)
Financing Cash Flows:
Proceeds from issuance of common stock	46,756	37,460	27,530
Repurchase of common stock	(33,914)	(89,996)	0
Tax benefit from share options exercised	266	0	0
Net decrease in short term borrowing	(8,149)	(1,284)	(2,162)
Debt and equity issuance costs	0	(9,020)	(1,220)
Proceeds from notes payable and revolving credit facility	0	253,000	100,225
Repayments of notes payable and revolving credit facility	(3,016)	(219,919)	(102,263)
Net cash provided by (used in) financing activities	1,943	(29,759)	22,110
Effect of exchange rate changes on cash and cash equivalents	(3,164)	(1)	2,205
Net change in cash and cash equivalents	77,284	13,386	33,773
Cash and cash equivalents at the beginning of the period	146,499	133,113	99,340
Cash and cash equivalents at the end of the period	$ 223,783	$ 146,499	$ 133,113