Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 178,946	$ 83,313
Accounts receivable, net of allowance of $13,683 and $14,799, at December 31, 2018 and December 31, 2017, respectively	206,772	189,460
Prepaid expenses	19,970	16,589
Income tax receivable	18,817	1,892
Deferred financing costs, net	564	564
Other current assets	240	836
Total current assets	425,309	292,654
Property and equipment, net	94,435	98,581
Goodwill	487,617	487,617
Intangible assets, net	67,140	91,482
Deferred financing costs, net	1,673	2,237
Other assets	2,344	2,589
Total assets	1,078,518	975,160
Current liabilities:
Accounts payable, accrued expenses and other liabilities	74,902	61,900
Estimated liability for appeals	21,723	30,787
Total current liabilities	96,625	92,687
Long-term liabilities:
Revolving credit facility	240,000	240,000
Net deferred tax liabilities	18,485	21,989
Deferred rent	4,118	4,852
Other liabilities	5,894	9,403
Total long-term liabilities	268,497	276,244
Total liabilities	365,122	368,931
Commitments and contingencies
Shareholders' equity:
Preferred stock -- $0.01 par value; 5,000,000 shares authorized; none issued	0	0
Common stock -- $0.01 par value; 175,000,000 shares authorized; 98,924,501 shares issued and 85,261,664 shares outstanding at December 31, 2018; 96,536,251 shares issued and 83,256,858 shares outstanding at December 31, 2017	989	965
Capital in excess of par value	425,748	368,721
Retained earnings	422,235	366,164
Treasury stock, at cost: 13,663,194 shares at December 31, 2018 and 13,279,393 shares at December 31, 2017	(135,576)	(129,621)
Total shareholders' equity	713,396	606,229
Total liabilities and shareholders' equity	$ 1,078,518	$ 975,160