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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012
Cash flows from operating activities: |  |  |
Net income | $ 282,360 | $ 237,314 | $ 185,251
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 132,664 | 118,664 | 108,112
(Benefit) provision for deferred income taxes | (28,505) | 22,248 | (12,150)
Excess tax benefits from stock option exercises | (9,540) | (6,713) | (8,995)
Share-based compensation expense | 15,742 | 10,892 | 3,068
Loss on disposition of property and equipment, net | 2,368 | 616 | 857
Changes in assets and liabilities: |  |  |
Receivables | (15,368) | (2,917) | (251)
Inventories | (27,713) | (32,237) | (20,817)
Prepaid expenses and other assets | 2,985 | 16,057 | 6,317
Payables, accrued expenses and other liabilities | 68,162 | 31,756 | 21,310
Net cash provided by operating activities | 423,155 | 395,680 | 282,702
Cash flows from investing activities: |  |  |
Cash paid for property and equipment | (186,101) | (168,875) | (190,010)
Cash paid for marketable securities | (727,987) | (372,689) | (169,467)
Sales and maturities of marketable securities | 451,866 | 207,576 | 414,769
Net cash (used in) provided by investing activities | (462,222) | (333,988) | 55,292
Cash flows from financing activities: |  |  |
Proceeds from the exercise of stock options | 35,218 | 30,671 | 4,136
Excess tax benefits from stock option exercises | 9,540 | 6,713 | 8,995
Share repurchases related to share repurchase program | (10,695) |  | (538,311)
Share repurchases related to taxes for share-based awards | (397) |  | (7,167)
Net cash provided by (used in) financing activities | 33,666 | 37,384 | (532,347)
Effect of exchange rate changes on cash and cash equivalents | 2,132 | 978 | (631)
(Decrease) increase in cash and cash equivalents | (3,269) | 100,054 | (194,984)
Cash and cash equivalents at beginning of period | 245,327 | 145,273 | 340,257
Cash and cash equivalents at end of period | 242,058 | 245,327 | 145,273
Cash paid during the year for: |  |  |
Income taxes | 159,628 | 103,006 | 120,847
Non-cash investing activities-Accrued capital expenditures | $ 20,889 | $ 15,055 | $ 21,955

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration