Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 105,040	$ 120,409
Investments	89,483	61,295
Accounts receivable, net	102,571	77,413
Income tax receivable	2,964	2,788
Other current assets	15,828	11,368
Total current assets	315,886	273,273
Property and equipment, net	150,391	147,504
Right-of-use assets	70,320	72,719
Amortizable intangible assets, net	174,695	176,800
Goodwill	160,766	160,766
Other assets	1,963	1,687
Total assets	874,021	832,749
Current liabilities
Accounts payable	21,801	20,006
Accrued compensation and benefits	21,124	36,412
Accrued liabilities	31,661	22,473
Income taxes payable	26,568	12,167
Deferred revenue	9,678
Current portion of lease liability	8,818	8,648
Total current liabilities	119,650	99,706
Deferred income taxes, noncurrent	28,049	26,195
Other long-term liability	429	436
Lease liability, less current portion	66,643	68,793
Total liabilities	214,771	195,130
Commitments and contingencies
Stockholders' equity
Common stock, $0.01 par value, 100,000 shares authorized; 53,966 and 53,830 shares issued and 30,823 and 31,058 shares outstanding at March 31, 2023 and December 31, 2022, respectively	540	538
Treasury stock, at cost, 23,143 and 22,772 shares of common stock at March 31, 2023 and December 31, 2022, respectively	(1,752,844)	(1,711,423)
Additional paid-in capital	312,677	309,310
Accumulated other comprehensive loss	(414)	(533)
Retained earnings	2,099,291	2,039,727
Total stockholders' equity	659,250	637,619
Total liabilities and stockholders' equity	$ 874,021	$ 832,749