CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 243,262	$ 309,171
Accounts receivable (less allowance for losses and sales adjustments of $13,965 in 2022 and $12,086 in 2021)	501,200	521,059
Short-term investments	44,973	52,300
Prepaid expenses	63,586	55,513
Income tax receivable	0	18,137
Other current assets	6,878	8,151
Total current assets	859,899	964,331
Accounts receivable, long-term	14,742	13,937
Operating lease right-of-use assets	42,369	39,720
Property and equipment, net	177,508	181,193
Other assets:
Software development costs, net	36,311	28,489
Goodwill	2,440,843	2,359,674
Other intangibles, net	1,072,479	1,052,493
Non-current investments	34,342	46,353
Other non-current assets	45,313	45,971
Assets, Total	4,723,806	4,732,161
Current liabilities:
Accounts payable	128,284	119,988
Accrued liabilities	140,938	158,424
Operating lease liabilities	11,186	10,560
Current income tax payable	1,374	0
Deferred revenue	454,678	510,529
Current portion of term loans	30,000	30,000
Total current liabilities	766,460	829,501
Revolving credit facility	0	0
Term loans	698,988	718,511
Convertible senior notes due 2026, net	593,194	592,765
Deferred revenue, long-term	0	38
Deferred income taxes	230,292	228,085
Operating lease liabilities, long-term	38,403	36,336
Other long-term liabilities	8,735	2,893
Commitments and contingencies	0	0
Total liabilities	2,336,072	2,408,129
Shareholders' equity:
Preferred stock, $10.00 par value; 1,000,000 shares authorized; none issued	0	0
Common stock, $0.01 par value; 100,000,000 shares authorized; 48,147,969 shares issued and outstanding as of March 31, 2022 and December 31, 2021	481	481
Additional paid-in capital	1,098,933	1,075,650
Accumulated other comprehensive loss, net of tax	(743)	(46)
Retained earnings	1,313,598	1,273,614
Treasury stock, at cost; 6,696,638 and 6,832,640 shares in 2022 and 2021, respectively	(24,535)	(25,667)
Total shareholders' equity	2,387,734	2,324,032
Liabilities and Equity, Total	$ 4,723,806	$ 4,732,161