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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 9 Months Ended
--- | ---
Oct. 31, 2015 | Oct. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net income | $ 41,044,000 | $ 33,580,000
Adjustments to reconcile net income to net cash (used in) provided by operating activities |  |
Stock option compensation expense | 1,708,000 | 1,489,000
Depreciation | 444,000 | 423,000
Amortization of purchased intangibles | 283,000 | 182,000
Deferred income tax expense (benefit) | 988,000 | (336,000)
Gain on the deconsolidation of a variable interest entity | (349,000) |
Changes in operating assets and liabilities: |  |
Accounts receivable | (8,072,000) | 546,000
Costs and estimated earnings in excess of billings | 323,000 | 213,000
Prepaid expenses and other assets | (1,604,000) | (308,000)
Accounts payable and accrued expenses | (4,702,000) | 29,147,000
Billings in excess of costs and estimated earnings | (76,530,000) | 21,423,000
Change in accumulated other comprehensive loss | (411,000) |
Net cash (used in) provided by operating activities | (46,878,000) | 86,359,000
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Purchases of short-term investments | (168,000,000) |
Maturities of short-term investments | 64,079,000 |
Purchase of APC, net of cash acquired (Note 2) | (4,210,000) |
Purchases of property, plant and equipment | (2,671,000) | (1,842,000)
Loans to energy project developers | (931,000) | (614,000)
Net cash used in investing activities | (111,733,000) | (2,456,000)
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Proceeds from the exercise of stock options | 1,670,000 | 3,884,000
Excess income tax benefit on exercised stock options | 88,000 | 1,025,000
Net cash provided by financing activities | 1,758,000 | 4,909,000
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS | (156,853,000) | 88,812,000
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD | 333,691,000 | 272,209,000
CASH AND CASH EQUIVALENTS, END OF PERIOD | 176,838,000 | 361,021,000
SUPPLEMENTAL CASH FLOW INFORMATION |  |
Cash paid for income taxes | $ 20,734,000 | 11,022,000
Common stock issued in connection with the acquisition of APC (noncash transaction, see Note 2) | 3,536,000 |
Cash dividends declared, payable in November 2015 and 2014, respectively (noncash transaction, see Note 12) | $ 10,379,000 | $ 10,166,000

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