Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Total	Adtran Networks SE [Member]	Common Stock [Member]	Common Stock [Member] Adtran Networks SE [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Adtran Networks SE [Member]	Retained Earnings (Deficit) [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Non-controlling Interest [Member]	Non-controlling Interest [Member] Adtran Networks SE [Member]
Beginning Balance at Dec. 31, 2020	$ 372,944		$ 797		$ 281,466		$ 781,813	$ (679,493)	$ (11,639)
Beginning Balance, Shares at Dec. 31, 2020			79,652
Net loss	(8,635)						(8,635)
Other comprehensive income (loss), net of tax	(275)								(275)
Dividend payments ($0.09 per share)	(17,529)						(17,529)
Non-cash dividend payments ($0.09 per share)							(5)	5
Dividends accrued on unvested restricted stock units	(320)						(320)
Deferred compensation adjustments, net of tax	(1,248)							(1,248)
ADTRAN Stock options exercised	6,432						(1,842)	8,274
PSUs, RSUs and restricted stock vested	(1,747)						(12,662)	10,915
Adtran Networks stock-based compensation expense	7,480				7,480
Ending Balance at Dec. 31, 2021	357,102		$ 797		288,946		740,820	(661,547)	(11,914)
Ending Balance, Shares at Dec. 31, 2021			79,652
Net loss	(8,888)						(2,037)			$ (6,851)
Acquisition of Adtran Networks		$ 894,675		$ 280		$ 577,980					$ 316,415
Acquisition of Adtran Networks, Shares				27,995
Retirement of treasury stock			$ (303)				(655,761)	656,064
Retirement of treasury stock, Shares			(30,330)
Other comprehensive income (loss), net of tax	57,709								38,040	(19,669)
Dividend payments ($0.09 per share)	(22,885)						(22,885)
Dividends accrued on unvested restricted stock units	353						353
Deferred compensation adjustments, net of tax	(71)							(71)
ADTRAN Stock options exercised	6,131	726	$ 3			472	5,330	798			254
ADTRAN Stock options exercised, Shares			399
PSUs, RSUs and restricted stock vested	(9,847)		$ 4				(10,482)	631
PSUs, RSUs and restricted stock vested, Shares			372
Reclassification of Adtran Networks stock options	286				187					99
Adtran Networks stock-based compensation expense	26,141	2,181			26,141	2,108					73
Ending Balance at Dec. 31, 2022	$ 1,303,613		$ 781		895,834		55,338	(4,125)	26,126	329,659
Ending Balance, Shares at Dec. 31, 2022	78,088		78,088
Net loss	$ (259,343)						(256,164)			(3,179)
Reclassification and remeasurement from equity to mezzanine equity for non-controlling interests in Adtran Networks	(443,757)					(116,895)					$ (326,862)
Other comprehensive income (loss), net of tax	21,717								21,335	$ 382
Dividend payments ($0.09 per share)	(21,237)						(21,237)
Dividends accrued on unvested restricted stock units	8						8
Deferred compensation adjustments, net of tax	(1,845)						(145)	(1,700)
ADTRAN Stock options exercised	$ 164	$ 323				323	164
ADTRAN Stock options exercised, Shares	23	50	23
PSUs, RSUs and restricted stock vested	$ (1,106)		$ 9				(1,115)
PSUs, RSUs and restricted stock vested, Shares			859
Redemption of redeemable non-controlling interest	371						371
Foreign currency remeasurement of redeemable non-controlling interest	(9,604)						(9,604)
Annual recurring compensation earned	(11,524)						(11,524)
Adtran Networks stock-based compensation expense	16,016	$ 26			16,016	$ 26
Ending Balance at Dec. 31, 2023	$ 593,822		$ 790		$ 795,304		$ (243,908)	$ (5,825)	$ 47,461
Ending Balance, Shares at Dec. 31, 2023	78,970		78,970