| USD ($) $ in Thousands | Jun 30, 2026 | Mar 31, 2026 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Sep 30, 2022 | Jun 30, 2022 | Mar 31, 2022 | Sep 30, 2021 | Jun 30, 2021 | Mar 31, 2021 | Sep 30, 2020 | Jun 30, 2020 | Mar 31, 2020 | Sep 30, 2019 | Jun 30, 2019 | Mar 31, 2019 | Sep 30, 2018 | Jun 30, 2018 | Mar 31, 2018 | Sep 30, 2017 | Jun 30, 2017 | Mar 31, 2017 | Sep 30, 2016 | Jun 30, 2016 | Mar 31, 2016 | Sep 30, 2015 | Jun 30, 2015 | Mar 31, 2015 | Sep 30, 2014 | Jun 30, 2014 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CASH FLOWS FROM OPERATING ACTIVITIES: | |||||||||||||||||||||||||||||||||||||
Net income | $ 1,212,900 | $ 1,022,900 | $ 853,000 | $ 888,800 | $ 813,800 | $ 747,938 | $ 665,428 | $ 637,692 | $ 545,327 | $ 491,885 | $ 436,473 | $ 353,999 | |||||||||||||||||||||||||
Adjustments to reconcile net income to net cash provided by operating activities: | |||||||||||||||||||||||||||||||||||||
Depreciation and amortization | 23,400 | 23,300 | 23,200 | 12,800 | 13,800 | 15,538 | 15,498 | 15,614 | 17,006 | 18,322 | 20,905 | 17,157 | |||||||||||||||||||||||||
Stock-based compensation | 120,400 | 120,900 | 127,900 | 85,200 | 93,000 | 98,123 | 79,292 | 77,215 | 85,390 | 67,127 | 62,881 | 65,477 | |||||||||||||||||||||||||
Noncash lease expense | - | - | - | - | - | - | 4,712 | 4,580 | 4,461 | 4,521 | 4,633 | 4,676 | |||||||||||||||||||||||||
Deferred income taxes | (108,200) | (104,900) | 135,400 | (230,800) | (107,100) | (148,266) | (150,638) | (77,822) | (87,202) | (59,134) | (71,153) | (42,418) | |||||||||||||||||||||||||
Gain on strategic investments | - | - | - | - | - | - | 0 | 0 | 473 | - | - | - | |||||||||||||||||||||||||
Gain on sale of marketable securities | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Unrealized gain on equity investments | - | - | - | - | - | - | - | - | - | (24,743) | 5,571 | (708) | |||||||||||||||||||||||||
Amortization (accretion) of investment premiums (discounts) | - | - | - | - | - | (16,766) | (15,425) | (12,418) | (10,391) | (7,778) | (4,220) | 2,710 | |||||||||||||||||||||||||
Other | (7,200) | (3,400) | (2,500) | (8,900) | (12,100) | 1,921 | - | - | - | - | - | - | |||||||||||||||||||||||||
Provision for bad debts | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Amortization of debt discount | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Excess tax benefit on stock-based compensation | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Amortization of investment premiums | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Changes in operating assets and liabilities: | |||||||||||||||||||||||||||||||||||||
Accounts receivable, net | (342,400) | (36,900) | 134,200 | (187,700) | (295,400) | 105,727 | (136,754) | (65,472) | (53,648) | 83,149 | 60,221 | (65,612) | |||||||||||||||||||||||||
Inventories | (155,200) | (133,000) | (96,600) | (101,800) | (122,700) | 83,814 | 171,428 | (80,024) | (29,204) | (181,631) | (392,997) | (247,740) | |||||||||||||||||||||||||
Other assets | (321,000) | (298,700) | (280,500) | (289,500) | (113,700) | (80,542) | (130,659) | 38,082 | 2,242 | (120,864) | - | - | |||||||||||||||||||||||||
Prepaid expenses and other current assets | - | - | - | - | - | - | - | - | - | - | (82,278) | 89,153 | |||||||||||||||||||||||||
Other assets | - | - | - | - | - | - | - | - | - | - | 26,361 | (12,356) | |||||||||||||||||||||||||
Accounts payable | 76,500 | (35,600) | (61,900) | 153,300 | 6,700 | (5,769) | 70,998 | (207,234) | (81,165) | 20,341 | 94,564 | 2,311 | |||||||||||||||||||||||||
Accrued liabilities | - | - | - | - | - | 2,498 | 49,491 | (136,554) | 47,063 | 11,763 | 58,655 | 30,900 | |||||||||||||||||||||||||
Accrued legal settlement | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Deferred revenue | 667,300 | 826,200 | 624,300 | 844,000 | 297,400 | 388,545 | 455,544 | 157,038 | 109,847 | (7,370) | 51,028 | (92,446) | |||||||||||||||||||||||||
Income taxes, net | (154,500) | 352,900 | (257,600) | (88,900) | 241,300 | (14,304) | (83,470) | 157,537 | 148,070 | 89,900 | 108,200 | - | |||||||||||||||||||||||||
Interest payable | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Interest payable—related party | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Income taxes payable | - | - | - | - | - | - | - | - | - | - | - | 30,282 | |||||||||||||||||||||||||
Other liabilities | 71,000 | (40,200) | 69,300 | 123,600 | (173,300) | 5,291 | (6,434) | 5,571 | 708 | (7,315) | (4,361) | (1,280) | |||||||||||||||||||||||||
Net cash provided by operating activities | 1,083,000 | 1,693,500 | 1,268,200 | 1,200,100 | 641,700 | 1,174,456 | 989,011 | 513,805 | 698,977 | 434,090 | 374,483 | 134,105 | |||||||||||||||||||||||||
CASH FLOWS FROM INVESTING ACTIVITIES: | |||||||||||||||||||||||||||||||||||||
Proceeds from maturities of marketable securities | 768,700 | 739,900 | 939,100 | 852,000 | 799,200 | 474,776 | 362,136 | 590,436 | 299,645 | 441,284 | 824,021 | 448,107 | |||||||||||||||||||||||||
Investments in privately-held companies and intangibles | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Escrow receipts from past business acquisitions | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Sale (purchase) of investments in privately-held companies and intangible assets | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Proceeds from investments in privately-held companies | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Proceeds from sale of marketable securities | 117,500 | 376,900 | 25,500 | 7,100 | 8,800 | 8,115 | - | 36,750 | 27,859 | - | 21,725 | 21,036 | |||||||||||||||||||||||||
Purchases of marketable securities | (2,396,300) | (1,932,600) | (2,110,600) | (1,160,200) | (1,545,500) | (844,110) | (836,867) | (912,441) | (542,136) | (530,408) | (861,612) | (331,510) | |||||||||||||||||||||||||
Purchases of property and equipment | (29,700) | (54,500) | (30,100) | (24,000) | (28,400) | (7,025) | (3,160) | (9,395) | (11,212) | (11,581) | (5,631) | (10,440) | |||||||||||||||||||||||||
Other | (40,000) | 5,000 | (10,000) | - | (0) | (6,628) | - | - | - | - | - | - | |||||||||||||||||||||||||
Cash paid for business combinations, net of cash acquired | - | - | - | (300,000) | - | - | - | - | - | 1,799 | 0 | - | |||||||||||||||||||||||||
Investments in notes and privately-held companies | - | - | - | - | - | - | - | (1,000) | - | (4,250) | - | - | |||||||||||||||||||||||||
Investments and notes receivable in privately-held companies | - | - | - | - | - | - | - | - | - | - | (250) | (12,691) | |||||||||||||||||||||||||
Purchases of investments in privately-held companies | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Proceeds from (purchases of) investments in privately-held companies | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Proceeds from repayment of notes receivable | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Change in restricted cash | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Purchases of intangible assets | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Investment in privately-held companies | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Net cash used in investing activities | (1,579,800) | (865,300) | (1,186,100) | (625,100) | (765,900) | (373,872) | (477,891) | (295,650) | (225,844) | (102,906) | (21,747) | 126,193 | |||||||||||||||||||||||||
CASH FLOWS FROM FINANCING ACTIVITIES: | |||||||||||||||||||||||||||||||||||||
Principal payments of lease financing obligations | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Proceeds from issuance of common stock under equity plans | 3,500 | 29,900 | 25,600 | 3,200 | 28,100 | 20,984 | 9,373 | 25,144 | 23,387 | 7,314 | 23,096 | 20,082 | |||||||||||||||||||||||||
Payments—deferred offering costs | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Proceeds from issuance of common stock under equity plans | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Tax withholding paid on behalf of employees for net share settlement | (5,000) | (26,200) | (5,000) | (4,500) | (34,800) | (11,453) | (10,458) | (25,541) | (8,173) | (6,542) | (9,224) | (6,740) | |||||||||||||||||||||||||
Repurchases of common stock | - | (0) | - | (195,900) | (787,100) | (65,157) | (172,013) | (62,653) | - | (30,004) | (82,275) | (47,582) | |||||||||||||||||||||||||
Other | - | (3,700) | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Proceeds from issuance of common stock under employee stock purchase plan | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Excess tax benefit on stock-based compensation | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Issuance costs from initial public offering | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Net cash used in financing activities | (1,500) | 0 | 20,600 | (197,200) | (793,800) | (55,626) | (173,098) | (63,050) | 15,214 | (29,232) | (68,403) | (34,240) | |||||||||||||||||||||||||
Effect of exchange rate changes | (1,000) | (2,600) | (1,600) | 2,600 | 700 | 1,681 | (1,084) | (1,608) | (1,363) | 115 | 314 | (3,049) | |||||||||||||||||||||||||
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | (499,300) | 825,600 | 101,100 | 380,400 | (917,300) | 746,639 | 336,938 | 153,497 | 486,984 | 302,067 | 284,647 | 223,009 | |||||||||||||||||||||||||
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: | |||||||||||||||||||||||||||||||||||||
Cash paid for income taxes, net of refunds | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Cash paid for interest—lease financing obligation | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION: | |||||||||||||||||||||||||||||||||||||
Property and equipment included in accounts payable and accrued liabilities | - | - | - | - | - | - | 3,645 | 746 | (1,688) | 727 | 4,926 | 1,184 | |||||||||||||||||||||||||
Right-of-use assets recognized upon the adoption of ASC 842 | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Right-of-use assets obtained in exchange for lease obligations | - | - | - | - | - | - | 1,665 | 0 | 2,116 | 1,781 | 15,229 | 1,278 | |||||||||||||||||||||||||
Common stock issued for business acquisition | - | - | - | - | - | - | - | - | - | 2,331 | 0 | - | |||||||||||||||||||||||||
Unpaid deferred offering costs | - | - | - | - | - | - | - | - | - | - | - | - | |||||||||||||||||||||||||
Acquisition of building with financing obligation | - | - | - | - | - | - | - | - | - | - | - | - |