Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 145,610	$ 133,116
Accounts receivable, net of allowance for doubtful accounts of $4,849 and $4,535, respectively and estimated allowance for appeals of $6,614 and $4,824, at December 31, 2015 and 2014, respectively	169,146	157,101
Prepaid expenses	$ 11,261	11,810
Prepaid income taxes		5,142
Deferred income taxes	$ 7,460	7,811
Other current assets	3,051	2,639
Total current assets	336,528	317,619
Property and equipment, net	96,551	116,027
Goodwill	361,468	361,468
Intangible assets, net	54,308	74,578
Deferred tax assets	4,873	6,957
Other assets	4,329	4,339
Total assets	858,057	880,988
Current liabilities:
Accounts payable, accrued expenses and other liabilities	51,661	54,549
Estimated liability for appeals	33,078	$ 36,799
Income taxes payable	3,873
Total current liabilities	88,612	$ 91,348
Long-term liabilities:
Revolving credit facility	197,796	197,796
Deferred tax liabilities	38,421	50,853
Deferred rent	6,006	5,037
Other liabilities	2,520	2,864
Total long-term liabilities	244,743	256,550
Total liabilities	$ 333,355	$ 347,898
Commitments and contingencies (Note 13)
Shareholders' equity:
Preferred stock -- $0.01 par value; 5,000,000 shares authorized; none issued
Common stock -- $0.01 par value; 125,000,000 shares authorized; 95,263,461 shares issued and 83,989,715 shares outstanding at December 31, 2015; 94,511,444 shares issued and 87,985,139 shares outstanding at December 31, 2014	$ 952	$ 943
Capital in excess of par value	330,290	313,214
Retained earnings	288,474	263,947
Treasury stock, at cost: 11,273,746 and 6,526,305 shares at December 31, 2015 and 2014, respectively	(95,014)	(45,014)
Total shareholders' equity	524,702	533,090
Total liabilities and shareholders' equity	$ 858,057	$ 880,988