CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities:
Net income	$ 245,081	$ 199,664
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	109,983	102,390
Amortization of deferred commissions costs	55,373	46,728
Amortization of Senior Notes discount and issuance costs	1,771	1,742
Non-cash lease expense	23,108	21,118
Stock-based compensation expense	54,097	46,988
Deferred income taxes, net	(21,676)	16,255
Credit loss expense	13,468	7,797
Other operating activities, net	(1,774)	10
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(36,177)	(17,715)
Prepaid expenses and other current assets	(17,235)	(18,820)
Deferred commissions	(83,875)	(49,798)
Accounts payable and other liabilities	2,131	(27,912)
Lease liabilities	(27,615)	(23,596)
Income taxes payable	(29,051)	(3,583)
Deferred revenue	4,488	15,800
Other assets	1,492	2,150
Net cash provided by operating activities	293,589	319,218
Investing activities:
Proceeds from sale of property and equipment and other assets	5,034	245
Purchase of Richmond assets and other intangibles	(31,530)	(123,623)
Purchases of property and equipment and other assets	(43,659)	(21,533)
Cash paid for acquisitions, net of cash acquired	(6,331)	(152,594)
Net cash used in investing activities	(76,486)	(297,505)
Financing activities:
Repayments of long-term debt assumed in acquisition	(2,155)	0
Repurchase of restricted stock to satisfy tax withholding obligations	(20,259)	(29,306)
Proceeds from equity offering, net of transaction costs	746,170	0
Proceeds from exercise of stock options and employee stock purchase plan	10,777	15,025
Other financing activities	0	(57)
Net cash provided by (used in) financing activities	734,533	(14,338)
Effect of foreign currency exchange rates on cash and cash equivalents	(4,297)	(1,700)
Net increase in cash, cash equivalents and restricted cash	947,339	5,675
Cash, cash equivalents and restricted cash at the beginning of period	3,827,126	3,755,912
Cash, cash equivalents and restricted cash at the end of period	4,774,465	3,761,587
Supplemental cash flow disclosures:
Interest paid	29,473	31,030
Income taxes paid	141,869	58,234
Supplemental non-cash investing and financing activities:
Consideration owed for acquisitions	52	376
Accrued capital expenditures and non-cash landlord incentives	5,808	660
Accrued transaction costs from equity offering	$ 470	$ 0