CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net income	$ 187,651	$ 172,791
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,690	64,127
Amortization of deferred commissions costs	45,267	35,996
Amortization of Senior Notes discount and issuance costs	1,197	1,178
Non-cash lease expense	14,147	15,080
Stock-based compensation expense	41,871	35,959
Deferred income taxes, net	(6,989)	(14,946)
Credit loss expense	13,938	6,890
Other operating activities, net	540	(1,149)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(40,601)	(33,318)
Prepaid expenses and other current assets	(4,220)	3,152
Deferred commissions	(65,028)	(54,155)
Accounts payable and other liabilities	54,422	14,098
Lease liabilities	(16,559)	(15,932)
Income taxes payable, net	12,916	(27,770)
Deferred revenue	8,873	8,520
Other assets	(735)	1,578
Net cash provided by operating activities	298,380	212,099
Investing activities:
Proceeds from sale of property and equipment and other assets	0	5,034
Purchase of Richmond assets	(45,621)	(25,664)
Purchases of property and equipment and other assets	(8,801)	(30,746)
Cash paid for acquisitions, net of cash acquired	0	(6,331)
Net cash used in investing activities	(54,422)	(57,707)
Financing activities:
Repayments of long-term debt assumed in acquisition	0	(2,155)
Repurchase of restricted stock to satisfy tax withholding obligations	(22,445)	(19,755)
Proceeds from exercise of stock options and employee stock purchase plan	16,175	7,340
Net cash used in financing activities	(6,270)	(14,570)
Effect of foreign currency exchange rates on cash and cash equivalents	(363)	(2,832)
Net increase in cash and cash equivalents	237,325	136,990
Cash and cash equivalents at the beginning of period	4,967,970	3,827,126
Cash and cash equivalents at the end of period	5,205,295	3,964,116
Supplemental cash flow disclosures:
Interest paid	15,432	14,953
Income taxes paid	63,725	99,507
Supplemental non-cash investing and financing activities:
Consideration owed for acquisitions	0	55
Accrued capital expenditures and non-cash landlord incentives	$ 8,220	$ 9,538