Consolidated Statements of Loss - USD ($) shares in Thousands		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023	Dec. 31, 2022
Revenue
Total Revenue		$ 922,720,000		$ 1,149,100,000	$ 1,025,536,000
Cost of Revenue
Total Cost of Revenue		592,406,000		816,037,000	698,284,000
Gross Profit		330,314,000		333,063,000	327,252,000
Selling, general and administrative expenses		233,369,000		258,149,000	208,889,000
Research and development expenses		221,463,000		258,311,000	173,757,000
Asset impairment		0		0	17,433,000
Goodwill impairment		292,583,000		37,874,000	0
Operating Loss		(417,101,000)		(221,271,000)	(72,827,000)
Interest and dividend income		3,058,000		2,340,000	2,123,000
Interest expense		(22,053,000)		(16,299,000)	(3,437,000)
Net investment gain (loss)		3,587,000		2,754,000	(11,339,000)
Other income, net		246,000		1,266,000	14,517,000
Loss Before Income Taxes		(432,263,000)		(231,210,000)	(70,963,000)
Income tax (expense) benefit		(8,785,000)		(28,133,000)	62,075,000
Net Loss		(441,048,000)		(259,343,000)	(8,888,000)
Net Income (Loss) attributable to non-controlling interest	[1]	9,824,000		6,946,000	(6,851,000)
Net Loss attributable to ADTRAN Holdings, Inc.		$ (450,872,000)		$ (266,289,000)	$ (2,037,000)
Weighted average shares outstanding – basic		78,928		78,416	62,346
Weighted average shares outstanding – diluted		78,928		78,416	62,346
Loss per common share attributable to ADTRAN Holdings, Inc. - basic		$ (5.67)	[2]	$ (3.39)	$ (0.03)
Loss per common share attributable to ADTRAN Holdings, Inc. - diluted		$ (5.67)	[2]	$ (3.39)	$ (0.03)
Network Solutions [Member]
Revenue
Total Revenue		$ 738,964,000		$ 974,389,000	$ 916,793,000
Cost of Revenue
Total Cost of Revenue		511,070,000		722,582,000	647,105,000
Gross Profit		219,297,000		227,494,000	269,688,000
Network Solutions - Charges and Inventory Write-Down [Member]
Cost of Revenue
Total Cost of Revenue		8,597,000		24,313,000	0
Services & Support [Member]
Revenue
Total Revenue		183,756,000		174,711,000	108,743,000
Cost of Revenue
Total Cost of Revenue		72,739,000		69,142,000	51,179,000
Gross Profit		$ 111,017,000		105,569,000	$ 57,564,000
Goodwill impairment				$ 37,900,000

[1] For the year ended December 31, 2024 we accrued $9.8 million of net income attributable to non-controlling interest, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA. For the year ended December 31, 2023, we accrued $10.1 million, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA, partially offset by a $3.2 million net loss attributable to non-controlling interests pre-DPLTA.12-24

[2] Loss per common share attributable to ADTRAN Holdings, Inc. - basic and diluted - reflects a $3.0 million effect of redemption of RNCI for the year ended December 31, 2024. See Note 19 for additional information.