Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 629,030	$ 694,842
Short-term investments	238,151	229,200
Accounts receivable, net of allowances of $8,262 and $9,811, respectively (includes $14,550 and $9,272 due from related party, respectively)	263,659	316,342
Prepaid expenses and other current assets	62,089	60,290
Total current assets	1,192,929	1,300,674
Long-term investments	121,552	122,593
Property and equipment, net	160,399	161,209
Operating lease right-of-use assets	53,585	55,617
Goodwill	1,557,078	1,531,455
Other purchased intangibles, net	139,985	149,513
Deferred income taxes, noncurrent	6,143	5,917
Other assets	26,839	20,090
TOTAL ASSETS	3,663,171	3,770,280
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable and accrued expenses	213,001	226,621
Income taxes payable, current	2,025	3,151
Deferred revenue, current	190,418	185,571
Operating lease liabilities, current	26,459	27,156
Current portion of long-term debt	0	54,609
Other current liabilities	288	130
Total current liabilities	432,191	497,238
Long-term debt	1,122,945	1,036,018
Deferred revenue, noncurrent	13,655	14,839
Operating lease liabilities, noncurrent	49,719	53,708
Income taxes payable, noncurrent	11,675	11,675
Liability for uncertain tax positions	42,949	42,546
Deferred income taxes, noncurrent	91,211	108,982
Other long-term liabilities	33,332	37,542
TOTAL LIABILITIES	1,797,677	1,802,548
Commitments and contingencies (Note 9)	0	0
Preferred stock, $0.01 par value	0	0
Common stock, $0.01 par value. Authorized 95,000,000; total issued and outstanding 47,296,611 and 47,440,137 shares at March 31, 2022 and December 31, 2021, respectively.	470	474
Additional paid-in capital	415,653	509,122
Retained earnings	1,508,802	1,515,358
Accumulated other comprehensive loss	(59,431)	(57,222)
TOTAL STOCKHOLDERS’ EQUITY	1,865,494	1,967,732
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	3,663,171	3,770,280
Trade names
ASSETS
Intangible assets, net (excluding goodwill)	144,084	147,761
Customer Relationships
ASSETS
Intangible assets, net (excluding goodwill)	260,577	275,451
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