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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Oct. 31, 2013 | Oct. 31, 2012
Cash flows from operating activities: |  |
Net income | $ 30,176 | $ 11,614
Adjustments to reconcile net income to net cash used in operating activities: |  |
Depreciation and amortization | 12,524 | 8,039
Stock-based compensation expense | 5,792 | 6,269
Provision for doubtful accounts | 3,087 | 3,145
Gain on cash surrender value of life insurance policies | (4,587) | (2,178)
Gain on marketable securities | (6,369) | (1,129)
Deferred income taxes | 3,949 | 5,174
Change in other assets and liabilities, net of effects of acquisition: |  |
Deferred compensation | 7,372 | (3,112)
Receivables due from clients | (40,826) | (23,004)
Income tax and other receivables | 2,325 | (1,774)
Prepaid expenses and other assets | (2,373) | (1,697)
Investment in unconsolidated subsidiaries | (1,022) | (974)
Income taxes payable | 3,771 | (3,634)
Accounts payable and accrued liabilities | (44,928) | (40,996)
Other | (4,498) | 924
Net cash used in operating activities | (35,607) | (43,333)
Cash flows from investing activities: |  |
Purchase of property and equipment | (11,471) | (6,606)
Cash paid for acquisition, net of cash acquired |  | (34,437)
Purchase of marketable securities | (23,299) | (32,816)
Proceeds from sales/maturities of marketable securities | 38,911 | 30,763
Change in restricted cash | 2,861 |
Payment of contingent consideration from acquisition | (15,000) |
Premiums on life insurance policies | (438) | (438)
Dividends received from unconsolidated subsidiaries | 510 | 418
Net cash used in investing activities | (7,926) | (43,116)
Cash flows from financing activities: |  |
Purchase of common stock | (1,967) | (2,643)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan | 3,854 | 1,019
Tax benefit from exercise of stock options | 137 | 161
Net cash provided by (used in) financing activities | 2,024 | (1,463)
Effect of exchange rate changes on cash and cash equivalents | 71 | (1,177)
Net decrease in cash and cash equivalents | (41,438) | (89,089)
Cash and cash equivalents at beginning of period | 224,066 | 282,005
Cash and cash equivalents at end of period | $ 182,628 | $ 192,916

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- Definition Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities. + 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=6871852&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 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + 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 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. 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 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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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + 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=6871852&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),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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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
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