CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 139,222	$ 135,227
Accounts receivable, net of allowance for doubtful accounts of $1,028 and $830, respectively and estimated allowance for appeals of $8,545 and $6,985 at March 31, 2013 and December 31, 2012, respectively	151,054	153,014
Prepaid expenses	14,114	14,283
Prepaid income taxes	5,882
Current portion of deferred financing costs	3,229	3,336
Other current assets	688	317
Total current assets	314,189	306,177
Property and equipment, net	130,028	129,327
Goodwill, net	370,774	370,774
Intangible assets, net	103,982	109,919
Deferred financing costs	5,111	5,867
Other assets	4,022	3,988
Total assets	928,106	926,052
Current liabilities:
Accounts payable, accrued expenses and other liabilities	32,208	40,867
Acquisition related contingent consideration	631	588
Current portion of term loan	35,000	35,000
Deferred tax liabilities	2,341	2,398
Estimated liability for appeals	24,360	21,787
Total current liabilities	94,540	100,640
Long-term liabilities:
Deferred rent	529	500
Acquisition related contingent consideration	428	428
Term loan	288,750	297,500
Other liabilities	4,056	3,305
Deferred tax liabilities	60,012	60,805
Total long-term liabilities	353,775	362,538
Total liabilities	448,315	463,178
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; 92,984,526 shares issued and 87,559,679 shares outstanding at March 31, 2013; 92,374,539 shares issued and 86,949,692 shares outstanding at December 31, 2012	928	923
Capital in excess of par value	281,898	271,962
Retained earnings	216,979	210,003
Treasury stock, at cost: 5,424,847 shares at March 31, 2013 and at December 31, 2012	(20,014)	(20,014)
Total shareholders' equity	479,791	462,874
Total liabilities and shareholders' equity	$ 928,106	$ 926,052