Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 302,329	$ 104,162
Accounts receivable (less allowance for credit losses of $9,188 and $6,937 as of September 30, 2020 and December 31, 2019, respectively)	279,492	247,683
Prepaid expenses and other current assets	84,595	53,105
Assets of discontinued operations	207,791	201,986
Total current assets	874,207	606,936
Property and equipment, net	407,228	424,670
Operating lease assets	86,489	65,825
Goodwill, net	2,298,876	2,286,896
Other intangible assets, net	334,363	375,629
Capitalized data and database costs, net	314,399	308,409
Investment in affiliates, net	1,121	16,666
Other assets	76,787	74,250
Total assets	4,393,470	4,159,281
Current liabilities:
Accounts payable and other accrued expenses	190,997	139,511
Accrued salaries and benefits	91,763	83,418
Dividends payable	0	17,374
Contract liabilities, current	401,986	320,634
Liabilities of discontinued operations	50,497	42,708
Current portion of long-term debt	21,382	56,022
Operating lease liabilities, current	16,245	18,058
Total current liabilities	772,870	677,725
Long-term debt, net of current	1,548,785	1,610,538
Contract liabilities, net of current	584,907	563,190
Deferred income tax liabilities	67,171	92,783
Operating lease liabilities, net of current	103,293	85,139
Other liabilities	193,705	178,696
Total liabilities	3,270,731	3,208,071
Stockholders' equity:
Preferred stock, $0.00001 par value; 500 shares authorized, no shares issued or outstanding	0	0
Common stock, $0.00001 par value; 180,000 shares authorized; 79,545 and 78,972 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively	1	1
Additional paid-in capital	135,267	111,000
Retained earnings	1,185,904	1,006,992
Accumulated other comprehensive loss	(198,433)	(166,783)
Total stockholders' equity	1,122,739	951,210
Total liabilities and equity	$ 4,393,470	$ 4,159,281