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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Cash flows from operating activities: |  |  |
Net income | $ 377,678 | $ 454,533 | $ 417,083
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization expense | 124,811 | 89,559 | 91,800
Operating lease right-of-use assets amortization expense | 41,270 | 37,545 | 40,902
Bad debt expense (recovery) | 1,814 | (4,402) | 4,047
Deferred taxes | (59,297) | (64,195) | (37,194)
Stock-based compensation expense | 176,764 | 167,297 | 147,730
Unrealized gain on derivative instruments | 0 | 0 | (7,904)
Impairment charges | 175 | 417 | 6,019
Loss on sale of business | 0 | 0 | 25,922
Other | 10,858 | 5,727 | (599)
Changes in assets and liabilities: |  |  |
Trade receivables and contract assets | (69,129) | 15,588 | 32,356
Prepaid and other assets | (14,844) | (76,959) | 8,409
Accounts payable | (12,683) | (29,084) | 154
Accrued expenses and other liabilities | 144,128 | 10,673 | (84,610)
Operating lease liabilities | (46,248) | (39,365) | (48,093)
Income taxes payable | (20,363) | (8,166) | (33,388)
Net cash provided by operating activities | 654,934 | 559,168 | 562,634
Cash flows from investing activities: |  |  |
Purchases of property and equipment | (42,243) | (32,146) | (28,415)
Purchases of short-term investments | (2,057) | (1,229) | (11,169)
Proceeds from short-term investments | 0 | 61,509 | 10,865
Acquisition of businesses, net of cash acquired (Note 3) | (3,432) | (912,158) | (24,817)
Purchases of non-marketable securities | (1,025) | (7,612) | (3,296)
Proceeds from sale of non-marketable securities | 3,051 | 4,344 | 0
Other investing activities, net | (3,341) | 2,312 | (9,936)
Net cash used in investing activities | (49,047) | (884,980) | (66,768)
Cash flows from financing activities: |  |  |
Proceeds from issuance of stock under employee incentive programs | 54,578 | 53,731 | 51,636
Payments of withholding taxes related to net share settlements of equity awards | (26,802) | (35,190) | (29,102)
Proceeds from debt | 5,714 | 8 | 825
Repayment of debt | (8,260) | (1,865) | (2,969)
Repurchase of common stock | (662,159) | (398,028) | (164,924)
Payment of contingent consideration for previously acquired businesses | (6,244) | (6,246) | (10,235)
Purchase of subsidiary shares from noncontrolling interest | (1,358) | 0 | 0
Other financing activities, net | (6,669) | (2,817) | (11,004)
Net cash used in financing activities | (651,200) | (390,407) | (165,773)
Effect of exchange rate changes on cash, cash equivalents and restricted cash | 56,298 | (36,497) | 29,379
Net increase (decrease) in cash, cash equivalents and restricted cash | 10,985 | (752,716) | 359,472
Cash, cash equivalents and restricted cash, beginning of period | 1,290,392 | 2,043,108 | 1,683,636
Cash, cash equivalents and restricted cash, end of period | 1,301,377 | 1,290,392 | 2,043,108
Cash paid during the year for: |  |  |
Interest | 1,397 | 3,738 | 4,698
Supplemental disclosure of non-cash investing and financing activities: |  |  |
Acquisition-date fair value of contingent consideration issued for acquisition of businesses | 935 | 9,755 | 14,850
Capital expenditures incurred but not yet paid | $ 4,838 | $ 4,190 | $ 23,986

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_ShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration