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Stock-Based Compensation (Stock Incentive Plans and Stock Options) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense	$ 3,600	$ 4,200	$ 11,400	$ 12,200
Shares available for issuance	4,700,000		4,700,000
Aggregate intrinsic value based on fair market value	$ 829		$ 829		$ 3,087
Total pre-tax intrinsic value of options exercised	$ 34		$ 200
Stock options vested	100,000	0	100,000	0
2024 Employee Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share available issuance under shareholder	4,000,000		4,000,000
Contractual term			10 years
Multiplier used when issuing PSUs, restricted stock and RSUs	1		1
Forfeiture of stock increase in issuance of common stock	1		1
2024 Employee Stock Incentive Plan [Member] | RSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			4 years
2024 Employee Stock Incentive Plan [Member] | Employee Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			4 years
2024 Directors Stock Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share available issuance under shareholder	700,000		700,000
Contractual term			10 years
Multiplier used when issuing PSUs, restricted stock and RSUs	1		1
Forfeiture of stock increase in issuance of common stock	1		1
2020 Employee Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of additional shares of common stock granted			0
Adtran Networks SE [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options vested			0
Liability based award cash settled	$ 200

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