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Summary of Significant Accounting Policies - Additional Information (Details)
€ in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2023
EUR (€)
shares
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2023
EUR (€)
shares
Sep. 30, 2022
USD ($)
Sep. 30, 2023
EUR (€)
Dec. 31, 2022
Oct. 18, 2022
shares
Jul. 18, 2022
USD ($)
Summary Of Significant Accounting Policy [Line Items]                    
Percentage of guaranteed interest rate 5.00%     5.00%     5.00%      
Percentage of guaranteed interest rate plus a variable component 3.12%     3.12%     3.12%      
Aggregate exit compensation payments obligation including guaranteed interest $ 344,200     $ 344,200     € 325,300      
Expire date of exit compensation       Mar. 16, 2023 Mar. 16, 2023          
Annual recurring compensation obligation       $ 11,200 € 10,600          
Accrued annual recurring compensation obligation $ 2,900     $ 8,600            
Number of shares tendered | shares 1,000 1,000   64,000 64,000          
Exit compensation payments $ 9 € 8   $ 1,200 € 1,100          
Net loss 78,563   $ 41,934 157,743   $ 40,918        
Comprehensive Income (Loss) attributable to non-controlling interest 2,914   (10,156) 5,808   (10,156)        
Adjustment [Member]                    
Summary Of Significant Accounting Policy [Line Items]                    
Net loss 5,828     17,210            
Comprehensive Income (Loss) attributable to non-controlling interest $ 2,914   $ (10,062) $ 5,564   $ (10,062)        
ASU 2021-08 [Member]                    
Summary Of Significant Accounting Policy [Line Items]                    
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true     true     true      
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jul. 01, 2022     Jul. 01, 2022     Jul. 01, 2022      
Administrative Agent [Member]                    
Summary Of Significant Accounting Policy [Line Items]                    
Credit agreement maximum borrowing capacity                   $ 100,000
Credit agreement current borrowing capacity                   $ 400,000
Adtran Networks SE [Member]                    
Summary Of Significant Accounting Policy [Line Items]                    
Number of shares tendered | shares       64,000 64,000          
Exit compensation payments $ 9 € 8   $ 1,200 € 1,100          
Equity method ownership percentage 34.60%     34.60%     34.60% 34.70%    
Adtran Networks SE [Member] | Maximum [Member]                    
Summary Of Significant Accounting Policy [Line Items]                    
Number of additional shares authorized to purchase | shares                 15,346,544  
Number of shares tendered | shares 1,000 1,000