Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 88,127	$ 83,313
Accounts receivable, net of allowance of $14,322 and $14,799, at June 30, 2018 and December 31, 2017, respectively	193,114	189,460
Prepaid expenses	16,526	16,589
Income tax receivable	7,216	1,892
Deferred financing costs, net	564	564
Other current assets	266	836
Total current assets	305,813	292,654
Property and equipment, net	93,369	98,581
Goodwill	487,617	487,617
Intangible assets, net	78,708	91,482
Deferred financing costs, net	1,955	2,237
Other assets	2,618	2,589
Total assets	970,080	975,160
Current liabilities:
Accounts payable, accrued expenses and other liabilities	56,687	61,900
Estimated liability for appeals	22,252	30,787
Total current liabilities	78,939	92,687
Long-term liabilities:
Revolving credit facility	240,000	240,000
Net deferred tax liabilities	18,089	21,989
Deferred rent	4,539	4,852
Other liabilities	9,874	9,403
Total long-term liabilities	272,502	276,244
Total liabilities	351,441	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; 97,051,108 shares issued and 83,387,914 shares outstanding at June 30, 2018; 96,536,251 shares issued and 83,256,858 shares outstanding at December 31, 2017	970	965
Capital in excess of par value	382,630	368,721
Retained earnings	370,615	366,164
Treasury stock, at cost: 13,663,194 shares at June 30, 2018 and 13,279,393 shares at December 31, 2017	(135,576)	(129,621)
Total shareholders' equity	618,639	606,229
Total liabilities and shareholders' equity	$ 970,080	$ 975,160