CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 76,290	$ 93,366
Accounts receivable, net of allowance for doubtful accounts of $867 and $916, respectively and estimated allowance for appeals of $9,829 and $13,939 at March 31, 2014 and December 31, 2013, respectively	162,603	171,726
Prepaid expenses	11,650	12,942
Prepaid income taxes	4,817	6,792
Other current assets	531	489
Total current assets	255,891	285,315
Property and equipment, net	118,719	123,006
Goodwill	361,468	361,468
Intangible assets, net	90,121	95,312
Deferred financing costs	8,520	9,041
Other assets	4,585	4,460
Total assets	839,304	878,602
Current liabilities:
Accounts payable, accrued expenses and other liabilities	32,771	37,123
Acquisition related contingent consideration	523	945
Deferred tax liabilities	6,237	6,326
Estimated liability for appeals	35,007	41,852
Total current liabilities	74,538	86,246
Long-term liabilities:
Deferred rent	757	724
Revolving credit facility	197,796	232,796
Other liabilities	3,538	3,874
Deferred tax liabilities	51,645	52,523
Total long-term liabilities	253,736	289,917
Total liabilities	328,274	376,163
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; 94,190,422 shares issued and 87,664,117 shares outstanding at March 31, 2014; 93,826,453 shares issued and 87,300,148 shares outstanding at December 31, 2013	939	936
Capital in excess of par value	301,752	296,517
Retained earnings	253,353	250,000
Treasury stock, at cost: 6,526,305 shares at March 31, 2014 and at December 31, 2013	(45,014)	(45,014)
Total shareholders' equity	511,030	502,439
Total liabilities and shareholders' equity	$ 839,304	$ 878,602