Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 123,008	$ 110,635
Restricted cash	8,438	9,103
Accounts receivable, net of allowance for doubtful accounts of $113 and $851 at September 30, 2017 and December 31, 2016, respectively; and net of estimated allowance for refunds and appeals of $30,996 and $41,020 at September 30, 2017 and December 31, 2016, respectively	83,462	67,735
Prepaid expenses and other current assets	16,985	14,957
Total current assets	231,893	202,430
Property and equipment, net	78,414	67,640
Goodwill	1,251,325	1,196,024
Intangible assets, net	507,823	533,305
Other long-term assets	2,770	2,864
TOTAL ASSETS	2,072,225	2,002,263
Current liabilities:
Current maturities of long-term debt	18,000	18,000
Customer deposits	8,438	9,103
Accounts payable and accrued other expenses	36,410	23,162
Accrued compensation costs	40,123	58,589
Estimated liability for refunds and appeals	57,971	62,539
Total current liabilities	160,942	171,393
Long-term liabilities:
Long-term debt	753,592	762,202
Other long-term liabilities	5,656	8,799
Deferred tax liabilities	121,169	120,533
Total long-term liabilities	880,417	891,534
Total liabilities	1,041,359	1,062,927
Commitments and contingencies (Note 7)
Stockholders' equity:
Common stock ($0.001 par value; 600,000,000 shares authorized, 92,368,654 and 90,748,740 issued, and 92,368,654 and 90,741,340 outstanding at September 30, 2017 and December 31, 2016, respectively)	92	91
Additional paid-in capital	934,104	911,582
Retained earnings	101,452	33,917
Accumulated other comprehensive loss	(4,782)	(6,156)
Treasury stock, at cost (7,400 shares at December 31, 2016)		(98)
Total stockholders' equity	1,030,866	939,336
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 2,072,225	$ 2,002,263