CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 135,227	$ 97,003
Accounts receivable, net of allowance for doubtful accounts of $830 and $1,158, respectively and estimated allowance for appeals for $6,985 and $3,003, respectively	153,014	119,885
Prepaid expenses	14,283	6,602
Prepaid income taxes		2,418
Current portion of deferred financing costs	3,336	3,689
Other current assets	317	5,793
Net deferred tax asset		2,198
Total current assets	306,177	237,588
Property and equipment, net	129,327	127,177
Goodwill	370,774	361,786
Intangible assets, net	109,919	132,740
Deferred financing costs	5,867	9,203
Other assets	3,988	837
Total assets	926,052	869,331
Current liabilities:
Accounts payable, accrued expenses and other liabilities	40,867	40,546
Acquisition related contingent consideration	588	2,300
Current portion of term loan	35,000	17,500
Deferred tax liabilities	2,398
Estimated liability for appeals	21,787	7,380
Total current liabilities	100,640	67,726
Long-term liabilities:
Deferred rent	500	1,085
Acquisition related contingent consideration	428
Term loan	297,500	332,500
Other liabilities	3,305	2,423
Deferred tax liabilities	60,805	74,360
Total long-term liabilities	362,538	410,368
Total liabilities	463,178	478,094
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; 92,374,539 shares issued and 86,949,692 shares outstanding at December 31, 2012; 90,575,837 shares issued and 85,587,299 shares outstanding at December 31, 2011	923	906
Capital in excess of par value	271,962	240,241
Retained earnings	210,003	159,487
Treasury stock, at cost: 5,424,847 shares at December 31, 2012 and 4,988,538 shares at December 31, 2011	(20,014)	(9,397)
Total shareholders' equity	462,874	391,237
Total liabilities and shareholders' equity	$ 926,052	$ 869,331