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Business Combination - Additional Information (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jul. 15, 2022
USD ($)
$ / shares
Aug. 30, 2021
USD ($)
$ / shares
shares
Mar. 31, 2023
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
$ / shares
shares
Aug. 30, 2021
€ / shares
shares
Business Acquisition [Line Items]            
Common stock, par value | $ / shares   $ 0.01 $ 0.01   $ 0.01  
Common stock, shares outstanding | shares     78,361,000   77,889,000  
Common stock, reserved for future issuance | shares   27,994,595       27,994,595
Goodwill     $ 385,755   $ 381,724  
Total Revenue     323,912 $ 154,518    
Net loss attributable to ADTRAN Holdings, Inc.     (40,083) (1,127)    
Net loss attributable to non-controlling interest [1]     (370)      
Decrease in goodwill $ 8,700          
Network Solutions [Member]            
Business Acquisition [Line Items]            
Goodwill     301,419   298,280  
Total Revenue     282,418 138,374    
Services & Support [Member]            
Business Acquisition [Line Items]            
Goodwill     84,336   $ 83,444  
Total Revenue     41,494 16,144    
Common Stock [Member]            
Business Acquisition [Line Items]            
Percentage of common stock exchanged   64.00%        
ADVA Optical Networking SE [Member]            
Business Acquisition [Line Items]            
Business combination date of agreement   Aug. 30, 2021        
Common stock, shares outstanding | shares   33,957,538       33,957,538
Percentage of outstanding bearer shares   65.43%        
Fair value of stock options assumed   $ 12,800        
Goodwill 350,458   350,500      
Accounts receivable 114,659          
Other receivables 1,457          
Unpaid principal balance of account receivable 118,500          
Unpaid principal balance of other receivable 1,500          
Fair value of noncontrolling interest 316,415          
Total Revenue 192,300          
Net loss attributable to ADTRAN Holdings, Inc. $ 25,400          
Net loss attributable to non-controlling interest     6,000      
Shares held by noncontrolling interest | shares   17,941,496       17,941,496
Closing share price | (per share) $ 20.2 $ 17.64       € 17.58
Currency conversion rate 1.00318          
ADVA Optical Networking SE [Member] | Selling, General and Administrative Expense [Member]            
Business Acquisition [Line Items]            
Transaction costs incurred     26,100      
Transaction costs related to the business combination     $ 0 $ 1,500    
ADVA Optical Networking SE [Member] | Network Solutions [Member]            
Business Acquisition [Line Items]            
Goodwill $ 272,800          
ADVA Optical Networking SE [Member] | Services & Support [Member]            
Business Acquisition [Line Items]            
Goodwill $ 77,700          
ADVA Optical Networking SE [Member] | Common Stock [Member]            
Business Acquisition [Line Items]            
Number of shares issuable for each share of acquired entity | shares   0.8244        
Percentage of common stock exchanged   36.00%        
[1] For the three months ended March 31, 2023, we have recognized $3.2 million of net loss attributable to non-controlling interests pre-DPLTA, partially offset by $2.8 million, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA .