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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash Flows from Operating Activities:    
Net income $ 616,858 $ 536,666
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 78,734 69,835
Impairment charge 5,000 0
Provision for credit losses 6,274 4,360
Deferred income taxes 20,428 6,427
Share-based compensation expense 32,428 29,469
Other 376 1,491
Changes in assets and liabilities:    
Accounts receivable (82,844) (74,889)
Inventories (1,787) (4,081)
Other assets and liabilities (66,538) (133,460)
Accounts payable 4,481 (12,113)
Net cash provided by operating activities 613,410 423,705
Cash Flows from Investing Activities:    
Purchases of property and equipment (56,630) (64,128)
Acquisition of intangible assets (3,692) 0
Equity investments (799) 0
Proceeds from net investment hedges 2,081 890
Net cash used by investing activities (59,040) (63,238)
Cash Flows from Financing Activities:    
Borrowings (payments) on revolving credit facility, net 121,000 329,000
Payments of senior notes 0 (103,386)
Repurchases of common stock, including excise tax settlements (697,840) (738,995)
Proceeds from exercises of stock options and employee stock purchase plans 51,074 24,523
Shares withheld for statutory tax withholding payments on restricted stock (10,853) (7,094)
Net cash used by financing activities (536,619) (495,952)
Net effect of changes in exchange rates on cash (888) 11,813
Net increase (decrease) in cash and cash equivalents 16,863 (123,672)
Cash and cash equivalents at beginning of period 180,070 288,266
Cash and cash equivalents at end of period 196,933 164,594
Supplemental Cash Flow Information:    
Unpaid property and equipment, reflected in accounts payable and accrued liabilities $ 9,724 $ 8,460