Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flow from operating activities:
Net income from consolidated operations	$ 164,656	$ 280,338
Adjustments to reconcile net income to net cash provided by operating activities:
Equity-based compensation	13,646	6,488
Depreciation and amortization	13,040	4,340
Provision for credit losses	18,734	3,259
Noncash lease expense	1,710	298
Loss on disposal of fixed asset	309	598
Amortization of premium of marketable securities	3,223	3,171
Deferred taxes	(7,639)	(3,055)
Unrecognized tax benefits	1,005	128
Net loss on marketable securities	617	360
Gain on equity method investment		(3,734)
Other	(17)	(8)
Changes in operating assets and liabilities:
Trade accounts receivable	1,802	32,460
Other current and long-term assets	(1,854)	(6,025)
Accounts payable	(10,258)	(10,256)
Income tax payable	1,978	(26,920)
Accrued liabilities and other liabilities	264	28,141
Operating and finance lease liabilities	(1,679)	(293)
Net cash provided by operating activities	199,537	309,290
Cash flow from investing activities:
Purchase of marketable securities	(245,488)	(424,807)
Acquisition of businesses, net of cash acquired	(137,755)	(18,509)
Investment in private equity securities	(15,000)
Contingent consideration payout related to a business acquisition	(10,000)
Purchases of fixed assets	(8,618)	(14,427)
Proceeds from sale of fixed assets	18	13
Maturities of marketable securities	70,432	34,538
Proceeds from sale of marketable securities	133,407	51,696
Net cash used in investing activities	(213,004)	(371,496)
Cash flow from financing activities:
Repurchase of common stock	(10,577)
Common stock withholding for employee tax obligations	(930)	(552)
Repayment of notes payable	(368)
Principal paid for finance lease	(230)
Proceeds from exercise of stock options	19	68
Proceeds from public offerings of common stock, net of issuance costs		75,656
Proceeds from noncontrolling interest		10
Borrowing under margin account		58
Net cash (used in) provided by financing activities	(12,086)	75,240
Effect of exchange rate changes on cash and cash equivalents	(561)	1
Net (decrease) increase in cash and cash equivalents	(26,114)	13,035
Cash and cash equivalents at beginning of period	164,894	87,426
Cash and cash equivalents at end of period	138,780	100,461
Supplemental disclosures of cash flow information:
Income taxes paid	54,982	119,980
Supplemental disclosures of non-cash investing and financing activities:
Purchases of fixed assets in accounts payable	2,158	742
Purchases of fixed assets in notes payable	$ 3,833
Operating lease right-of-use assets obtained in exchange for lease liabilities		765
Operating lease right-of-use assets reduced due to lease modification and termination		185
Public offerings costs included in accounts payable		$ 30