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The Company and Significant Accounting Policies - Impairment and Loss on Lease Abandonment - Additional Information (Detail)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
Station
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Jun. 30, 2025
USD ($)
ft²
Dec. 31, 2024
USD ($)
Oct. 01, 2024
USD ($)
Accounting Policies [Line Items]            
Goodwill       $ 7,352 $ 7,352  
Assets held for sale       $ 7,247    
Impairment charge related to broadcast licenses and fixed assets   $ 23,700        
Lease expiration date       Jun. 30, 2034    
Operating lease liabilities       $ 7,648 7,744  
Long-term operating lease liabilities       $ 39,710 42,101  
Building            
Accounting Policies [Line Items]            
Leased space | ft²       38,000    
Lease expiration date       Jan. 31, 2034    
Loss on lease abandonment charges   16,100        
Acceleration of depreciation of leasehold improvements   9,100        
Operating lease liabilities       $ 1,600    
Long-term operating lease liabilities       21,100    
Discontinued Operations Held for Sale            
Accounting Policies [Line Items]            
Number of television stations held for sale | Station 2          
Assets held for sale       $ 4,700    
Impairment charge related to broadcast licenses and fixed assets   23,700        
Carrying value of broadcast licenses $ 28,000 28,000        
Stations fixed assets carrying value 400 400        
Discontinued Operations Held for Sale | Tecate, Mexico            
Accounting Policies [Line Items]            
Assets held for sale 1,800 1,800        
Discontinued Operations Held for Sale | Tijuana, Mexico            
Accounting Policies [Line Items]            
Assets held for sale $ 2,900 $ 2,900        
Meta Platforms            
Accounting Policies [Line Items]            
Impairment charges related to intangible subject to amortization     $ 14,000      
Media            
Accounting Policies [Line Items]            
Goodwill           $ 43,300
Goodwill, impaired, method for fair value determination       As of the most recent annual goodwill testing date, October 1, 2024, there was $43.3 million of goodwill in the media reporting unit. Based on the assumptions and estimates discussed in the Company's 2024 10-K, the media reporting unit carrying value exceeded its fair value, resulting in a goodwill impairment charge of $43.3 million for the year ended December 31, 2024. This impairment charge was a result of the Company updating its internal forecasts of future performance based on lower than anticipated political advertising revenue in the fourth quarter of 2024 and higher projected future costs due to planned investments in news programming and the sales and marketing teams. The calculation of the fair value of the reporting unit requires estimates of the discount rate and the long term projected growth rate.    
Impairment of goodwill         43,300  
Media | FCC Licenses            
Accounting Policies [Line Items]            
Impairment charge related to indefinite life intangible assets         $ 17,900  
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]         Asset Impairment Charges  
Media | Meta Platforms            
Accounting Policies [Line Items]            
Impairment of goodwill     $ 35,400      
Advertising Technology & Services            
Accounting Policies [Line Items]            
Goodwill           $ 7,400
Goodwill, impaired, method for fair value determination       Additionally, as of the most recent annual goodwill testing date, October 1, 2024, there was $7.4 million of goodwill in the advertising technology & services reporting unit. Based on the assumptions and estimates discussed in the Company's 2024 10-K, the fair value of the advertising technology & services reporting unit exceeded its carrying value by over 100%, resulting in no impairment charge for the year ended December 31, 2024. The calculation of the fair value of the advertising technology & services reporting unit requires estimates of the discount rate and the long term projected growth rate.    
Percentage of fair value of assets         100.00%  
Impairment of goodwill         $ 0