Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Measurements, Recurring | Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Liabilities	$ 28,000	$ 63,800
Fair Value, Measurements, Recurring | Corporate Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Assets	13,200	44,500
Fair Value, Measurements, Recurring | Money Market Account
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Assets	1,100	1,400
Fair Value, Measurements, Recurring | Level 1 | Money Market Account
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Assets	1,100	1,400
Fair Value, Measurements, Recurring | Level 2 | Corporate Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Assets	13,200	44,500
Fair Value, Measurements, Recurring | Level 3 | Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Liabilities	28,000	63,800
Fair Value, Measurements, Nonrecurring | FCC Licenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Assets	27,600	24,500
Total Gains (Losses)	(12,300)	(1,600)
Fair Value, Measurements, Nonrecurring | Level 3 | FCC Licenses
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value and Carrying Value on Assets	$ 27,600	$ 24,500