CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 144,804	$ 133,116
Accounts receivable, net of allowance for doubtful accounts of $2,672 and $1,898, respectively, and estimated allowance for appeals of $2,650 and $4,824 at September 30, 2015 and December 31, 2014, respectively	174,152	157,101
Prepaid expenses	10,624	11,810
Prepaid income taxes		5,142
Deferred tax assets	5,703	7,811
Other current assets	2,477	2,639
Total current assets	337,760	317,619
Property and equipment, net	99,429	116,027
Goodwill	361,468	361,468
Intangible assets, net	59,352	74,578
Deferred financing costs, net	5,394	6,957
Other assets	4,568	4,339
Total assets	867,971	880,988
Current liabilities:
Accounts payable, accrued expenses and other liabilities	43,588	54,549
Estimated liability for appeals	34,892	36,799
Income taxes payable	4,182
Total current liabilities	82,662	91,348
Long-term liabilities:
Revolving credit facility	197,796	197,796
Deferred tax liabilities	41,180	50,853
Deferred rent	6,188	5,037
Other liabilities	2,375	2,864
Total long-term liabilities	247,539	256,550
Total liabilities	$ 330,201	$ 347,898
Commitments and contingencies (Note 9)
Shareholders' equity:
Preferred stock-$0.01 par value; 5,000,000 shares authorized; none issued
Common stock - $0.01 par value; 175,000,000 shares authorized; 95,186,707 shares issued and 86,008,337 shares outstanding at September 30, 2015; 94,511,444 shares issued and 87,985,139 shares outstanding at December 31, 2014	$ 951	$ 943
Capital in excess of par value	327,084	313,214
Retained earnings	279,749	263,947
Treasury stock, at cost: 9,178,370 shares at September 30, 2015 and 6,526,305 shares at December 31, 2014 (Note 10)	(70,014)	(45,014)
Total shareholders' equity	537,770	533,090
Total liabilities and shareholders' equity	$ 867,971	$ 880,988