CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 127,016	$ 133,163
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	114,198	116,950
Losses from sale of investments	1	44
Share-based compensation expense	80,905	77,991
Change in fair value in available-for-sale investments	0	0
Amortization of operating lease right-of-use assets	12,258	9,240
Deferred income tax benefit	(44,000)	(32,845)
Other	398	0
Changes in operating assets and liabilities, exclusive of effects of acquired companies:
Accounts receivable	(37,768)	(34,163)
Income tax payable	(51,300)	10,759
Prepaid expenses and other current assets	(11,594)	(6,568)
Accounts payable	27,848	(13,750)
Operating lease liabilities	(8,224)	(9,324)
Accrued liabilities	(10,607)	(23,797)
Deferred revenue	28,357	20,592
Other long-term liabilities	5,533	11,306
Net cash provided by operating activities	233,021	259,598
Cash flows from investing activities:
Additions to property and equipment	(12,506)	(17,441)
Purchase of marketable security investments	(10,617)	(20,428)
Proceeds and maturities from marketable security investments	45,452	55,052
Investment in software development	(27,447)	(25,557)
Cost of acquisitions, net of cash acquired	(35,540)	(117,706)
Other	48	326
Net cash used by investing activities	(40,610)	(125,754)
Cash flows from financing activities:
Payment on term loans	(255,000)	(270,000)
Proceeds from exercise of stock options, net of withheld shares for taxes upon equity award settlement	8,438	298
Contributions from employee stock purchase plan	11,780	12,614
Net cash used by financing activities	(234,782)	(257,088)
Net decrease in cash and cash equivalents	(42,371)	(123,244)
Cash and cash equivalents at beginning of period	173,857	309,171
Cash and cash equivalents at end of period	131,486	185,927
Supplemental cash flow information:
Cash paid for interest	16,820	14,706
Cash paid for income taxes, net	118,000	35,324
Non-cash investing and financing activities:
Non-cash additions to property and equipment	$ 834	$ 32