Liability for Warranty Returns - Summary of Warranty Expense and Write-off Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Product Warranties Disclosures [Abstract]
Balance at beginning of period	$ 7,196	$ 5,403	$ 7,146
Plus: Adtran Networks acquisition		3,756
Plus: Amounts charged to cost and expenses	2,952	3,104	855
Plus: Foreign currency translation adjustments	82	334
Less: Deductions	(3,784)	(5,401)	(2,598)
Balance at end of period	$ 6,445	$ 7,196	$ 5,403