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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jul. 31, 2013 | Jul. 31, 2012
Cash flows from operating activities: |  |
Net income | $ 123,421 | $ 95,249
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 64,568 | 57,092
Benefit for deferred income taxes | (3,324) | (9,829)
Excess tax benefit on share-based compensation expense | (8,061) | (1,295)
Share-based compensation expense | 7,425 | 6,642
Loss (gain) on disposition of property and equipment, net | 1,348 | (87)
Changes in assets and liabilities: |  |
Receivables | (14,358) | (11,653)
Inventories | (65,226) | (72,762)
Prepaid expenses and other assets | 9,424 | 22,735
Payables, accrued expenses and other liabilities | 39,871 | 2,825
Net cash provided by operating activities | 155,088 | 88,917
Cash flows from investing activities: |  |
Cash paid for property and equipment | (66,766) | (93,154)
Cash paid for marketable securities | (317,375) | (132,638)
Sales and maturities of marketable securities | 245,759 | 122,343
Net cash used in investing activities | (138,382) | (103,449)
Cash flows from financing activities: |  |
Proceeds from the exercise of stock options | 30,188 | 2,645
Excess tax benefits from stock option exercises | 8,061 | 1,295
Share repurchases related to taxes for share-based awards | (365) |
Net cash provided by financing activities | 37,884 | 3,940
Effect of exchange rate changes on cash and cash equivalents | (1,371) | 800
Increase (decrease) in cash and cash equivalents | 53,219 | (9,792)
Cash and cash equivalents at beginning of period | 245,327 | 145,273
Cash and cash equivalents at end of period | 298,546 | 135,481
Cash paid during the year for: |  |
Income taxes | 55,099 | 56,501
Non-cash investing activities-Accrued capital expenditures | $ 10,848 | $ 20,290

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_ShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration