Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Operating Cash Flows:
Net income	$ 145,177	$ 153,558	$ 138,634
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant, and equipment	34,336	34,563	33,305
Amortization of intangible assets, debt costs and other	23,710	17,891	20,246
Stock-based compensation	35,807	29,350	23,697
Deferred income taxes	9,265	8,550	(1,634)
Changes in other long-term liabilities	876	(3,708)	(6,143)
Dividends received from unconsolidated entities, net of equity in income	507	1,290	4,358
Other	85	(11)	74
Changes in operating assets and liabilities, net of effect of acquired businesses:
Trade accounts receivable, net	(90,404)	(43,811)	(58,389)
Prepaid expenses and other	(16,348)	(17,774)	(21,861)
Term receivables, long-term	(34,808)	(21,285)	(30,980)
Accounts payable and accrued liabilities	2,481	4,473	(2,720)
Income taxes receivable and payable	1,442	(10,487)	(5,084)
Deferred revenue	26,082	(2,896)	45,784
Net cash provided by operating activities	138,208	149,703	139,287
Investing Cash Flows:
Proceeds from the sales and maturities of short-term investments	4,124	3,112	0
Purchases of short-term investments	0	7,820	0
Purchases of property, plant, and equipment	(48,366)	(30,761)	(45,130)
Acquisitions of businesses and other intangible assets, net of cash acquired	(84,596)	(20,906)	(15,652)
Net cash used in investing activities	(128,838)	(56,375)	(60,782)
Financing Cash Flows:
Proceeds from issuance of common stock	29,990	53,013	46,756
Repurchase of common stock	(70,053)	(49,995)	(33,914)
Tax benefit from share options exercised	280	386	266
Dividends paid	(22,911)	(20,398)	0
Net (decrease) increase in short-term borrowing	(2,660)	3,748	(8,149)
Repayments of other borrowings	(3,659)	(7,762)	(3,016)
Net repurchase of subsidiary shares from non-controlling interest	(41)	0	0
Net cash (used in) provided by financing activities	(69,054)	(21,008)	1,943
Effect of exchange rate changes on cash and cash equivalents	(3,357)	(2,781)	(3,164)
Net change in cash and cash equivalents	(63,041)	69,539	77,284
Cash and cash equivalents at the beginning of the period	293,322	223,783	146,499
Cash and cash equivalents at the end of the period	$ 230,281	$ 293,322	$ 223,783