Accounts Payable and Accrued Expenses - Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accounts payable	$ 58,800	$ 49,700
Accrued payroll and compensated absences	12,300	7,400
Accrued bonuses	5,800	4,000
Professional fees	300	1,300
Deferred revenue	5,900	3,100
Accrued national representation fees	1,700	1,600
Income taxes payable	6,500	3,400
Other taxes payable	8,800	10,400
Amounts due under joint sales agreements	1,000	1,200
Accrued property taxes	1,700	1,800
Accrued capital expenditures	900	1,200
Accrued media costs – digital	50,000	36,200
Accrued contingent consideration	44,600
Other	14,400	5,500
Accounts Payable and Accrued Expenses	$ 212,655	$ 126,849