Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities
Net income (loss)	$ (10,575)	$ 4,664
Adjustments to reconcile net income (loss) to operating activities:
Amortization, depreciation and write-offs	88,817	32,279
Amortization of debt issuance costs and discount	4,303	1,421
Stock-based compensation	29,959	3,462
Change in operating right-of-use asset	5,796	1,184
Loss on settlement of debt	16,852	0
Net unrealized gains on fair value remeasurement of financial instruments	(11,214)	0
Net gain on foreign currency remeasurement	(1,305)	(49)
Changes in operating assets and liabilities:
Accounts receivable	(43,917)	(3,435)
Prepaid expenses and other current assets	(18,775)	4,450
Other assets	472	53
Accounts payable	9,370	5,352
Operating lease liabilities	(5,631)	(1,098)
Accrued and other liabilities	(1,339)	(2,942)
Deferred revenue	(994)	346
Net cash provided by operating activities	61,819	45,687
Investing Activities
Purchase of property and equipment	(121)	(200)
Acquisitions, net of cash acquired	(4,152)	(54,499)
Purchase of non-marketable investments and other	(14,000)	0
Net cash used in investing activities	(18,273)	(54,699)
Financing Activities
Proceeds from debt issuance, net of issuance costs	844,729	49,835
Payments of debt principal	(302,327)	(3,053)
Payments of finance leases	(840)	(1,669)
Proceeds from exercise of stock options	12,882	145
Payments of deferred acquisition costs	(152,245)	(11,019)
Repurchases of common stock	0	(760)
Payments of deferred IPO costs	(1,825)	0
Net cash provided by financing activities	400,374	33,479
Effect of foreign exchange rate on cash and cash equivalents	(80)	7
Net increase in cash and cash equivalents	443,840	24,474
Cash and cash equivalents at beginning of the period	317,235	396,247
Cash and cash equivalents at end of the period	761,075	420,721
Supplemental non-cash investing and financing activities disclosures:
Acquisition not yet paid	32,161	5,370
Deferred IPO costs not yet paid	1,834	0
Assets acquired under finance leases	445	1,419
Supplemental disclosure of cash flow information:
Cash paid for interest on debt	15,662	15,837
Cash paid for income taxes	$ 221	$ 2,056