Condensed Consolidated Statements of Changes in Equity (Unaudited) - 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 (Deficit) Earnings [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, 2021	$ 357,102		$ 797		$ 288,946		$ 740,820	$ (661,547)	$ (11,914)
Beginning Balance, Shares at Dec. 31, 2021			79,652
Net (loss) income	(1,127)						(1,127)
Other comprehensive income (loss), net of tax	(1,642)								(1,642)
Dividend payments ($0.09 per share)	(4,438)						(4,438)
Dividends accrued on unvested RSUs	32						32
Deferred compensation adjustments, net of tax	(18)							(18)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested	(54)						(895)	841
ADTRAN Stock options exercised	568						(143)	711
ADTRAN Stock-based compensation expense	1,893				1,893
Ending Balance at Mar. 31, 2022	352,316		$ 797		290,839		734,249	(660,013)	(13,556)
Ending Balance, Shares at Mar. 31, 2022			79,652
Beginning Balance at Dec. 31, 2021	357,102		$ 797		288,946		740,820	(661,547)	(11,914)
Beginning Balance, Shares at Dec. 31, 2021			79,652
Other comprehensive income (loss), net of tax	(28,468)
Ending Balance at Sep. 30, 2022	1,184,827		$ 776		883,210		31,535	(4,083)	(33,151)	$ 306,540
Ending Balance, Shares at Sep. 30, 2022			77,619
Beginning Balance at Mar. 31, 2022	352,316		$ 797		290,839		734,249	(660,013)	(13,556)
Beginning Balance, Shares at Mar. 31, 2022			79,652
Net (loss) income	2,143						2,143
Other comprehensive income (loss), net of tax	(3,140)								(3,140)
Dividend payments ($0.09 per share)	(4,439)						(4,439)
Dividends accrued on unvested RSUs	(23)						(23)
Deferred compensation adjustments, net of tax	24							24
ADTRAN RSUs, PSUs, RSUs and restricted stock vested	(300)						(90)	(210)
ADTRAN Stock options exercised	68						(19)	87
ADTRAN Stock-based compensation expense	1,888				1,888
Ending Balance at Jun. 30, 2022	348,537		$ 797		292,727		731,821	(660,112)	(16,696)
Ending Balance, Shares at Jun. 30, 2022			79,652
Net (loss) income	(44,859)						(41,934)			(2,925)
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	(23,686)								(16,455)	(7,231)
Dividend payments ($0.09 per share)	(6,982)						(6,982)
Deferred compensation adjustments, net of tax	(35)							(35)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested	(40)						(40)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested, Shares			4
ADTRAN Stock options exercised	4,433	365	$ 2			236	4,431				129
ADTRAN Stock options exercised, Shares			298
ADTRAN Stock-based compensation expense	11,195	938			11,195	885					53
Reclassification of Adtran Networks stock options	286				187					99
Ending Balance at Sep. 30, 2022	1,184,827		$ 776		883,210		31,535	(4,083)	(33,151)	306,540
Ending Balance, Shares at Sep. 30, 2022			77,619
Beginning Balance at Dec. 31, 2022	$ 1,303,613		$ 781		895,834		55,338	(4,125)	26,126	329,659
Beginning Balance, Shares at Dec. 31, 2022	78,088		78,088
Annual recurring compensation earned	$ (2,809)						(2,809)
Net (loss) income	(40,453)						(37,274)			(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	8,782								8,400	382
Dividend payments ($0.09 per share)	(7,076)						(7,076)
Deferred compensation adjustments, net of tax	(1,792)							(1,792)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested	(138)		$ 6				(144)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested, Shares			561
ADTRAN Stock options exercised	58						58
ADTRAN Stock options exercised, Shares			6
ADTRAN Stock-based compensation expense	3,812	$ 9			3,812	9
Redemption of redeemable non-controlling interest	343						343
Foreign currency remeasurement of redeemable non-controlling interest	(430)						(430)
Ending Balance at Mar. 31, 2023	820,162		$ 787		782,760		8,006	(5,917)	34,526
Ending Balance, Shares at Mar. 31, 2023			78,655
Beginning Balance at Dec. 31, 2022	$ 1,303,613		$ 781		895,834		55,338	(4,125)	26,126	$ 329,659
Beginning Balance, Shares at Dec. 31, 2022	78,088		78,088
Other comprehensive income (loss), net of tax	$ (13,669)
ADTRAN Stock options exercised, Shares	8	13
Ending Balance at Sep. 30, 2023	$ 684,893		$ 787		791,290		(113,289)	(5,970)	12,075
Ending Balance, Shares at Sep. 30, 2023	78,688		78,688
Beginning Balance at Mar. 31, 2023	$ 820,162		$ 787		782,760		8,006	(5,917)	34,526
Beginning Balance, Shares at Mar. 31, 2023			78,655
Annual recurring compensation earned	(2,882)						(2,882)
Net (loss) income	(36,215)						(36,215)
Other comprehensive income (loss), net of tax	6,957								6,957
Dividend payments ($0.09 per share)	(7,076)						(7,076)
Dividends accrued for RSUs	9						9
Deferred compensation adjustments, net of tax	(26)							(26)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested	(44)						(44)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested, Shares			6
ADTRAN Stock options exercised		$ 92				92
ADTRAN Stock-based compensation expense	4,291	10			4,291	10
Redemption of redeemable non-controlling interest	6						6
Foreign currency remeasurement of redeemable non-controlling interest	(2,814)						(2,814)
Ending Balance at Jun. 30, 2023	782,470		$ 787		787,153		(41,010)	(5,943)	41,483
Ending Balance, Shares at Jun. 30, 2023			78,661
Annual recurring compensation earned	(2,914)						(2,914)
Net (loss) income	(75,649)						(75,649)
Other comprehensive income (loss), net of tax	(29,408)								(29,408)
Dividend payments ($0.09 per share)	(7,085)						(7,085)
Dividends accrued for RSUs	(8)						(8)
Deferred compensation adjustments, net of tax	(27)							(27)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested	(175)						(175)
ADTRAN RSUs, PSUs, RSUs and restricted stock vested, Shares			25
ADTRAN Stock options exercised	15	8				8	15
ADTRAN Stock options exercised, Shares			2
ADTRAN Stock-based compensation expense	4,126	$ 3			4,126	$ 3
Redemption of redeemable non-controlling interest	2						2
Foreign currency remeasurement of redeemable non-controlling interest	13,535						13,535
Ending Balance at Sep. 30, 2023	$ 684,893		$ 787		$ 791,290		$ (113,289)	$ (5,970)	$ 12,075
Ending Balance, Shares at Sep. 30, 2023	78,688		78,688