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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Oct. 31, 2018 | Oct. 31, 2017
Cash flows from operating activities: |  |
Net income | $ 8,725 | $ 66,161
Adjustments to reconcile net income to net cash used in operating activities: |  |
Depreciation and amortization | 22,749 | 24,656
Stock-based compensation expense | 12,369 | 10,283
Tradename write-offs | 106,555 |
Provision for doubtful accounts | 7,471 | 6,960
Gain on cash surrender value of life insurance policies | (3,003) | (4,227)
Loss (gain) on marketable securities | 836 | (6,797)
Deferred income taxes | (19,838) | 7,802
Change in other assets and liabilities: |  |
Deferred compensation | (1,646) | 12,560
Receivables due from clients | (52,536) | (59,020)
Income taxes and other receivables | 345 | (7,207)
Prepaid expenses and other assets | (5,326) | (2,129)
Unearned compensation | (21,103) | (45,589)
Investment in unconsolidated subsidiaries | (129) | (90)
Income taxes payable | (5,898) | 9,459
Accounts payable and accrued liabilities | (76,544) | (66,089)
Other | (5,216) | (2,893)
Net cash used in operating activities | (32,189) | (56,160)
Cash flows from investing activities: |  |
Purchase of property and equipment | (24,565) | (20,813)
Purchase of marketable securities | (8,539) | (6,738)
Proceeds from sales/maturities of marketable securities | 8,923 | 2,273
Premium on company-owned life insurance policies | (33,752) | (422)
Proceeds from life insurance policies | 4,517 | 971
Dividends received from unconsolidated subsidiaries |  | 60
Net cash used in investing activities | (53,416) | (24,669)
Cash flows from financing activities: |  |
Principal payments on term loan facility | (12,031) | (10,313)
Payment of contingent consideration from acquisitions | (455) | (485)
Repurchases of common stock | (22,745) | (29,261)
Payments of tax withholdings on restricted stock | (13,184) | (3,461)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan | 4,105 | 3,984
Dividends paid to shareholders | (11,743) | (11,537)
Dividends - noncontrolling interest | (690) | (1,558)
Borrowings under life insurance policies | 31,870 |
Payments on life insurance policy loans | (2,567) | (414)
Net cash used in financing activities | (27,440) | (53,045)
Effect of exchange rate changes on cash and cash equivalents | (20,124) | 5,617
Net decrease in cash and cash equivalents | (133,169) | (128,257)
Cash and cash equivalents at beginning of period | 520,848 | 410,882
Cash and cash equivalents at end of the period | $ 387,679 | $ 282,625

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