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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Cash flows - operating activities |  |
Net income | $ 14,032 | $ 15,586
Adjustments to reconcile net income to net cash used in operating activities: |  |
Depreciation and amortization | 4,790 | 3,873
Deferred income taxes | (87) | 6,669
Stock-based compensation expense | 2,644 | 1,853
Accretion expense related to earnout payments | 466 | 191
Gain on marketable securities | (539) | (1,645)
Loss on disposal of property and equipment | 14 | 130
Changes in assets and liabilities: |  |
Accounts receivable | (41,125) | (24,332)
Accounts payable | (2,069) | (1,137)
Accrued expenses | (182,590) | (325,975)
Deferred revenue | 1,951 | 147
Income taxes recoverable and payable, net | 4,723 | (3,083)
Retirement and pension plan assets and liabilities | 5,453 | 6,070
Prepaid expenses | (7,991) | (7,135)
Other assets and liabilities, net | (3,096) | (8,243)
Net cash used in operating activities | (203,424) | (337,031)
Cash flows - investing activities |  |
Acquisition of businesses, net of cash acquired | 0 | (29,907)
Capital expenditures | (6,173) | (3,808)
Purchases of marketable securities and investments | (5,400) | (6,172)
Proceeds from sales of marketable securities and investments | 66,285 | 267,965
Net cash provided by investing activities | 54,712 | 228,078
Cash flows - financing activities |  |
Cash dividends paid | (3,216) | (3,112)
Payment of employee tax withholdings on equity transactions | (2,862) | (4,141)
Acquisition earnout payments | 0 | (35,946)
Net cash used in financing activities | (6,078) | (43,199)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash | (4,997) | 1,396
Net decrease in cash, cash equivalents and restricted cash | (159,787) | (150,756)
Cash, cash equivalents and restricted cash at beginning of period | 412,618 | 355,489
Cash, cash equivalents and restricted cash at end of period | $ 252,831 | $ 204,733

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