Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 99,580	$ 110,691
Marketable securities	26,881	44,528
Restricted cash	761	753
Trade receivables, (including related parties of $6,440 and $5,814) net of allowance for doubtful accounts of $8,038 and $6,572	210,008	224,713
Assets held for sale	301
Prepaid expenses and other current assets (including related parties of $274 and $274)	36,655	27,238
Total current assets	374,186	407,923
Property and equipment, net of accumulated depreciation of $195,759 and $194,448	68,654	61,362
Intangible assets subject to amortization, net of accumulated amortization of $81,875 and $75,992 (including related parties of $3,249 and $3,714)	60,089	61,811
Intangible assets not subject to amortization	207,453	207,453
Goodwill	90,706	86,991
Deferred income taxes	2,591	2,591
Operating leases right of use asset	45,204	44,413
Other assets	16,273	8,297
Total assets	865,156	880,841
Current liabilities
Current maturities of long-term debt	6,799	5,256
Accounts payable and accrued expenses (including related parties of $1,134 and $1,215)	236,276	237,415
Operating lease liabilities	6,397	5,570
Total current liabilities	249,472	248,241
Long-term debt, less current maturities, net of unamortized debt issuance costs of $1,243 and $1,221	204,574	207,292
Long-term operating lease liabilities	46,863	42,151
Other long-term liabilities	14,538	30,198
Deferred income taxes	68,502	67,590
Total liabilities	583,949	595,472
Commitments and contingencies (note 6)
Redeemable noncontrolling interest	47,288
Stockholders' equity
Additional paid-in capital	739,571	776,298
Accumulated deficit	(504,323)	(504,375)
Accumulated other comprehensive income (loss)	(1,338)	(1,510)
Total stockholders' equity	233,919	270,422
Noncontrolling interest		14,947
Total equity	233,919	285,369
Total liabilities and equity	865,156	880,841
Class A common stock
Stockholders' equity
Common stock	8	8
Class U common stock
Stockholders' equity
Common stock	$ 1	$ 1