CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 694,842	$ 176,442
Short-term investments	229,200	663
Accounts receivable, net of allowances of $9,811 and $11,552, respectively (includes $9,272 and $0 due from related party, respectively)	316,342	309,549
Prepaid expenses and other current assets	60,290	52,160
Current assets, discontinued operations	0	84,029
Total current assets	1,300,674	622,843
Long-term investments	122,593	97,495
Property and equipment, net	161,209	131,524
Operating lease right-of-use assets	55,617	80,133
Trade names, net	147,761	158,553
Customer relationships, net	275,451	363,515
Goodwill	1,531,455	1,525,000
Other purchased intangibles, net	149,513	174,792
Deferred income taxes	5,917	12,195
Other assets	20,090	15,759
Other assets, discontinued operations	0	483,522
TOTAL ASSETS	3,770,280	3,665,331
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable and accrued expenses	226,621	197,855
Income taxes payable, current	3,151	30,447
Deferred revenue, current	185,571	166,132
Operating lease liabilities, current	27,156	29,634
Current portion of long-term debt	54,609	396,801
Other current liabilities	130	494
Current liabilities, discontinued operations	0	61,192
Total current liabilities	497,238	882,555
Total long-term debt, less current portion	1,036,018	1,182,220
Deferred revenue, noncurrent	14,839	14,201
Operating lease liabilities, noncurrent	53,708	73,628
Income taxes payable, noncurrent	11,675	11,675
Liability for uncertain tax positions	42,546	53,089
Deferred income taxes	108,982	157,308
Other long-term liabilities	37,542	41,400
Long-term liabilities, discontinued operations	0	38,237
TOTAL LIABILITIES	1,802,548	2,454,313
Commitments and contingencies (Note 12)	0	0
Preferred stock, $0.01 par value	0	0
Common stock, $0.01 par value. Authorized 95,000,000; total issued and outstanding 47,440,137 and 44,346,630 shares at December 31, 2021 and 2020, respectively.	474	443
Additional paid-in capital	509,122	456,274
Retained earnings	1,515,358	809,107
Accumulated other comprehensive loss	(57,222)	(54,806)
TOTAL STOCKHOLDERS’ EQUITY	1,967,732	1,211,018
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	3,770,280	3,665,331
Series A Preferred Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Preferred stock, $0.01 par value	0	0
Series B Preferred Stock
LIABILITIES AND STOCKHOLDERS’ EQUITY
Preferred stock, $0.01 par value	$ 0	$ 0