Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Operating Cash Flows:
Net income	$ 77,151	$ 26,052
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization of property, plant, and equipment	24,701	24,137
Amortization of intangible assets and debt costs	15,500	17,200
Dividends received from unconsolidated entities, net of equity in income (loss)	2,210	3,480
Loss on debt extinguishment	0	3,518
Write-off of debt discount and debt issuance costs	0	8,010
Stock-based compensation	17,162	16,623
Deferred income taxes	(1,965)	177
Changes in other long-term liabilities	(3,164)	(3,575)
Gain on Converstion of Equity Method Investment To Controlling Interest	0	(1,519)
Other	67	(18)
Changes in operating assets and liabilities, net of effect of acquired businesses:
Trade accounts receivable, net	(51,202)	60,828
Prepaid expenses and other	(6,270)	(6,612)
Term receivables, long-term	12,249	(35,712)
Accounts payable and accrued liabilities	(43,601)	(54,535)
Income taxes payable	(4,933)	(12,380)
Deferred revenue	14,967	(10,482)
Net cash provided by (used in) operating activities	52,872	35,192
Investing Cash Flows:
Purchases of property, plant, and equipment	(35,575)	(25,062)
Acquisitions of businesses and equity interests, net of cash acquired	(1,945)	(1,169)
Net cash used in investing activities	(37,520)	(26,231)
Financing Cash Flows:
Proceeds from issuance of common stock	33,028	23,391
Repurchase of common stock	(20,000)	(69,996)
Tax benefit from share options exercised	139	0
Net decrease in short-term borrowings	(11,432)	(8,336)
Debt and equity issuance costs	0	(8,929)
Proceeds from notes payable and revolving credit facility	0	253,000
Repayments of notes payable and revolving credit facility	(1,871)	(219,919)
Net cash provided by (used in) financing activities	(136)	(30,789)
Effect of exchange rate changes on cash and cash equivalents	(1,985)	704
Net change in cash and cash equivalents	13,231	(21,124)
Cash and cash equivalents at the beginning of the period	146,499	133,113
Cash and cash equivalents at the end of the period	$ 159,730	$ 111,989