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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | $ 77,426 | $ 50,204 | $ 43,455
Adjustments to reconcile net income to net cash provided by (used in) operating activities |  |  |
Impairment loss | 1,979 |  |
Deferred income tax expense | 1,237 | 3,421 | 896
Stock option compensation expense | 2,344 | 2,374 | 2,017
Depreciation | 2,043 | 779 | 551
Amortization of purchased intangibles assets | 1,163 | 531 | 243
Gain on the deconsolidation of a variable interest entity |  | (349) |
Other | 517 | 107 |
Changes in operating assets and liabilities |  |  |
Accounts receivable | 9,217 | (12,194) | (3,879)
Prepaid expenses and other assets | (668) | (2,751) | 501
Accounts payable and accrued expenses | 59,522 | (12,196) | 22,645
Billings in excess of costs and estimated earnings, net | 104,264 | (62,958) | 26,900
Net cash provided by (used in) operating activities | 259,044 | (33,032) | 93,329
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Purchases of short-term investments | (595,000) | (252,000) |
Maturities of short-term investments | 354,000 | 138,000 |
Purchase of subsidiaries, net of cash acquired (Note 3) |  | (17,381) |
Purchases of property, plant and equipment | (2,811) | (3,118) | (2,936)
Decrease (increase) in notes receivable |  | 3,960 | (614)
Net cash used in investing activities | (243,811) | (130,539) | (3,550)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Cash dividends | (15,260) | (10,378) | (10,166)
Cash distributions to joint venture partner | (9,500) |  | (25,000)
Proceeds from the exercise of stock options | 15,901 | 1,818 | 5,389
Excess income tax benefits on exercised stock options (Note 2) |  | (86) | 1,480
Net cash used in financing activities | (8,859) | (8,646) | (28,297)
EFFECTS OF EXCHANGE RATE CHANGES ON CASH | (85) | (565) |
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 6,289 | (172,782) | 61,482
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR | 160,909 | 333,691 | 272,209
CASH AND CASH EQUIVALENTS, END OF YEAR | 167,198 | 160,909 | 333,691
SUPPLEMENTAL CASH FLOW INFORMATION |  |  |
Cash paid for income taxes | $ 36,861 | $ 25,678 | $ 18,662
Common stock issued in connection with the acquisition of APC (noncash transaction, see Note 3) |  | 3,536 |

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- Definition The cash inflow associated with the sale of securities that had been designated as held-to-maturity. Excludes proceeds from maturities, prepayments and calls by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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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 -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: 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=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684 + Details
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- Definition The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation. + 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 (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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