CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 120,193	$ 93,366
Accounts receivable, net of allowance for doubtful accounts of $979 and $916, and estimated allowance for appeals of $7,327 and $13,939 at September 30, 2014 and December 31, 2013, respectively	169,123	171,726
Prepaid expenses	10,276	12,942
Prepaid income taxes		6,792
Other current assets	2,678	489
Total current assets	302,270	285,315
Property and equipment, net	116,945	123,006
Goodwill	361,468	361,468
Intangible assets, net	79,740	95,312
Deferred financing costs, net	7,478	9,041
Other assets	4,335	4,460
Total assets	872,236	878,602
Current liabilities:
Accounts payable, accrued expenses and other liabilities	41,008	37,123
Acquisition related contingent consideration	534	945
Income taxes payable	9,841
Deferred tax liabilities	3,430	6,326
Estimated liability for appeals	34,915	41,852
Total current liabilities	89,728	86,246
Long-term liabilities:
Deferred rent	4,616	724
Revolving credit facility	197,796	232,796
Other liabilities	3,103	3,874
Deferred tax liabilities	46,492	52,523
Total long-term liabilities	252,007	289,917
Total liabilities	341,735	376,163
Commitments and contingencies (Note 7)
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; 94,288,648 shares issued and 87,762,343 shares outstanding at September 30, 2014; 93,826,453 shares issued and 87,300,148 shares outstanding at December 31, 2013	940	936
Capital in excess of par value	308,234	296,517
Retained earnings	266,341	250,000
Treasury stock, at cost: 6,526,305 shares at September 30, 2014 and at December 31, 2013	(45,014)	(45,014)
Total shareholders' equity	530,501	502,439
Total liabilities and shareholders' equity	$ 872,236	$ 878,602