Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 119,709	$ 120,346
Restricted cash and cash equivalents	300	61,667
Investments	14,152	69,002
Accounts receivable, net	83,377	46,830
Interest receivable on Secured Note	5,192	4,650
Income tax receivable	3,559	8
Other current assets	11,255	6,963
Total current assets	237,544	309,466
Property and equipment, net	118,637	111,039
Right-of-use assets	27,730
Secured Note receivable	1,009,912	900,093
Amortizable intangible assets, net	204,236
Goodwill	160,871	2,941
Other assets	1,742	478
Total assets	1,760,672	1,324,017
Current liabilities
Accounts payable	20,742	14,274
Accrued compensation and benefits	23,689	15,427
Accrued liabilities	18,947	8,907
Income taxes payable	3,396	5,442
Deferred revenue	9,201
Current portion of lease liability	2,709
Current portion of notes payable	45,332	36,468
Total current liabilities	124,016	80,518
Deferred income taxes, noncurrent	18,310	6,465
Other long-term liabilities	16
Lease liability, less current portion	25,440
Notes payable, less current portion	211,060	23,437
Total liabilities	378,842	110,420
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value, 10,000 shares authorized; 0 shares issued and outstanding at September 30, 2019 and December 31, 2018
Common stock, $0.01 par value, 100,000 shares authorized; 53,050 and 52,690 shares issued and 48,303 and 48,201 shares outstanding at September 30, 2019 and December 31, 2018, respectively	530	527
Treasury stock, at cost, 4,747 and 4,489 shares of common stock at September 30, 2019 and December 31, 2018, respectively	(150,872)	(125,452)
Additional paid-in capital	268,279	256,806
Accumulated other comprehensive loss	(782)	(453)
Retained earnings	1,264,675	1,082,169
Total stockholders' equity	1,381,830	1,213,597
Total liabilities and stockholders' equity	$ 1,760,672	$ 1,324,017